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<!DOCTYPE html> < html lang = "en-US" > < head > < meta charset = "UTF-8" > < meta name = "viewport" content = "width=device-width,height=device-height,initial-scale=1.0" > < meta name = "apple-mobile-web-app-capable" content = "yes" > < meta http-equiv = "X-UA-Compatible" content = "ie=edge" > < meta property = "og:type" content = "website" > < meta name = "twitter:card" content = "summary" > < style > @ m e d i a s c r e e n { b o d y [ d a t a - b e s p o k e - v i e w = " " ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n , b o d y [ d a t a - b e s p o k e - v i e w = n e x t ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - i n f o - c o n t a i n e r b u t t o n , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - n o t e - c o n t a i n e r b u t t o n { a p p e a r a n c e : n o n e ; b a c k g r o u n d - c o l o r : i n i t i a l ; b o r d e r : 0 ; c o l o r : i n h e r i t ; c u r s o r : p o i n t e r ; f o n t - s i z e : i n h e r i t ; o p a c i t y : . 8 ; o u t l i n e : n o n e ; p a d d i n g : 0 ; t r a n s i t i o n : o p a c i t y . 2 s l i n e a r ; - w e b k i t - t a p - h i g h l i g h t - c o l o r : t r a n s p a r e n t } b o d y [ d a t a - b e s p o k e - v i e w = " " ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n : d i s a b l e d , b o d y [ d a t a - b e s p o k e - v i e w = n e x t ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n : d i s a b l e d , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - i n f o - c o n t a i n e r b u t t o n : d i s a b l e d , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - n o t e - c o n t a i n e r b u t t o n : d i s a b l e d { c u r s o r : n o t - a l l o w e d ; o p a c i t y : . 1 5 ! i m p o r t a n t } b o d y [ d a t a - b e s p o k e - v i e w = " " ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n : h o v e r , b o d y [ d a t a - b e s p o k e - v i e w = n e x t ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n : h o v e r , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - i n f o - c o n t a i n e r b u t t o n : h o v e r , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - n o t e - c o n t a i n e r b u t t o n : h o v e r { o p a c i t y : 1 } b o d y [ d a t a - b e s p o k e - v i e w = " " ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n : h o v e r : a c t i v e , b o d y [ d a t a - b e s p o k e - v i e w = n e x t ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n : h o v e r : a c t i v e , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - i n f o - c o n t a i n e r b u t t o n : h o v e r : a c t i v e , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - n o t e - c o n t a i n e r b u t t o n : h o v e r : a c t i v e { o p a c i t y : . 6 } b o d y [ d a t a - b e s p o k e - v i e w = " " ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n : h o v e r : n o t ( : d i s a b l e d ) , b o d y [ d a t a - b e s p o k e - v i e w = n e x t ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n : h o v e r : n o t ( : d i s a b l e d ) , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - i n f o - c o n t a i n e r b u t t o n : h o v e r : n o t ( : d i s a b l e d ) , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - n o t e - c o n t a i n e r b u t t o n : h o v e r : n o t ( : d i s a b l e d ) { t r a n s i t i o n : n o n e } b o d y [ d a t a - b e s p o k e - v i e w = " " ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n [ d a t a - b e s p o k e - m a r p - o s c = p r e v ] , b o d y [ d a t a - b e s p o k e - v i e w = n e x t ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n [ d a t a - b e s p o k e - m a r p - o s c = p r e v ] , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - i n f o - c o n t a i n e r b u t t o n . b e s p o k e - m a r p - p r e s e n t e r - i n f o - p a g e - p r e v { b a c k g r o u n d : # 0 0 0 0 u r l ( " d a t a : i m a g e / s v g + x m l ; b a s e 6 4 , P H N 2 Z y B 4 b W x u c z 0 i a H R 0 c D o v L 3 d 3 d y 5 3 M y 5 v c m c v M j A w M C 9 z d m c i I H Z p Z X d C b 3 g 9 I j A g M C A x M D A g M T A w I j 4 8 c G F 0 a C B m a W x s P S J u b 2 5 l I i B z d H J v a 2 U 9 I i N m Z m Y i I H N 0 c m 9 r Z S 1 s a W 5 l Y 2 F w P S J y b 3 V u Z C I g c 3 R y b 2 t l L W x p b m V q b 2 l u P S J y b 3 V u Z C I g c 3 R y b 2 t l L X d p Z H R o P S I 1 I i B k P S J N N j g g O T A g M j g g N T B s N D A t N D A i L z 4 8 L 3 N 2 Z z 4 = " ) n o - r e p e a t 5 0 % ; b a c k g r o u n d - s i z e : c o n t a i n ; o v e r f l o w : h i d d e n ; t e x t - i n d e n t : 1 0 0 % ; w h i t e - s p a c e : n o w r a p } b o d y [ d a t a - b e s p o k e - v i e w = " " ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n [ d a t a - b e s p o k e - m a r p - o s c = n e x t ] , b o d y [ d a t a - b e s p o k e - v i e w = n e x t ] . b e s p o k e - m a r p - p a r e n t > . b e s p o k e - m a r p - o s c > b u t t o n [ d a t a - b e s p o k e - m a r p - o s c = n e x t ] , b o d y [ d a t a - b e s p o k e - v i e w = p r e s e n t e r ] . b e s p o k e - m a r p - p r e s e n t e r - c o n t a i n e r . b e s p o k e - m a r p - p r e s e n t e r - i n f o - c o n t a i n e r b u t t o n . b e s p o k e - m a r p - p r e s e n t e r - i n f o - p a g e - n e x t { b a c k g r o u n d : # 0 0 0 0 u r l ( " d a t a : i m a g e / s v g + x m l ; b a s e 6 4 , P H N 2 Z y B 4 b W x u c z 0 i a H R 0 c D o v L 3 d 3 d y 5 3 M y 5 v c m c v M j A w M C 9 z d m c i I H Z p Z X d C b 3 g 9 I j A g M C A x M D A g M T A w I j 4 8 c G F 0 a C B m a W x s P S J u b 2 5 l I i B z d H J v a 2 U 9 I i N m Z m Y i I H N 0 c m 9 r Z S 1 s a W 5 l Y 2 F w P S J y b 3 V u Z C I g c 3 R y b 2 t l L W x p b m V q b 2 l u P S J y b 3 V u Z C I g c 3 R y b 2 t l L X d p Z H R o P S I 1 I i B k P S J t M z
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* Marp default theme.
*
* @theme default
* @author Yuki Hattori
*
* @auto-scaling true
* @size 16:9 1280px 720px
* @size 4:3 960px 720px
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*/div#\:\$p > svg > foreignObject > section{--base-size-4:calc(var(--marpit-root-font-size, 1rem) * 0.25);--base-size-8:calc(var(--marpit-root-font-size, 1rem) * 0.5);--base-size-16:calc(var(--marpit-root-font-size, 1rem) * 1);--base-text-weight-normal:400;--base-text-weight-medium:500;--base-text-weight-semibold:600;--fontStack-monospace:ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;}div#\:\$p > svg > foreignObject > section [data-theme=light],div#\:\$p > svg > foreignObject > section{color-scheme:light;--focus-outlineColor:#0969da;--fgColor-default:#1f2328;--fgColor-muted:#636c76;--fgColor-accent:#0969da;--fgColor-success:#1a7f37;--fgColor-attention:#9a6700;--fgColor-danger:#d1242f;--fgColor-done:#8250df;--bgColor-default:#fff;--bgColor-muted:#f6f8fa;--bgColor-neutral-muted:#afb8c133;--bgColor-attention-muted:#fff8c5;--borderColor-default:#d0d7de;--borderColor-muted:#d0d7deb3;--borderColor-neutral-muted:#afb8c133;--borderColor-accent-emphasis:#0969da;--borderColor-success-emphasis:#1a7f37;--borderColor-attention-emphasis:#bf8700;--borderColor-danger-emphasis:#cf222e;--borderColor-done-emphasis:#8250df;--color-prettylights-syntax-comment:#57606a;--color-prettylights-syntax-constant:#0550ae;--color-prettylights-syntax-constant-other-reference-link:#0a3069;--color-prettylights-syntax-entity:#6639ba;--color-prettylights-syntax-storage-modifier-import:#24292f;--color-prettylights-syntax-entity-tag:#0550ae;--color-prettylights-syntax-keyword:#cf222e;--color-prettylights-syntax-string:#0a3069;--color-prettylights-syntax-variable:#953800;--color-prettylights-syntax-brackethighlighter-unmatched:#82071e;--color-prettylights-syntax-brackethighlighter-angle:#57606a;--color-prettylights-syntax-invalid-illegal-text:#f6f8fa;--color-prettylights-syntax-invalid-illegal-bg:#82071e;--color-prettylights-syntax-carriage-return-text:#f6f8fa;--color-prettylights-syntax-carriage-return-bg:#cf222e;--color-prettylights-syntax-string-regexp:#116329;--color-prettylights-syntax-markup-list:#3b2300;--color-prettylights-syntax-markup-heading:#0550ae;--color-prettylights-syntax-markup-italic:#24292f;--color-prettylights-syntax-markup-bold:#24292f;--color-prettylights-syntax-markup-deleted-text:#82071e;--color-prettylights-syntax-markup-deleted-bg:#ffebe9;--color-prettylights-syntax-markup-inserted-text:#116329;--color-prettylights-syntax-markup-inserted-bg:#dafbe1;--color-prettylights-syntax-markup-changed-text:#953800;--color-prettylights-syntax-markup-changed-bg:#ffd8b5;--color-prettylights-syntax-markup-ignored-text:#eaeef2;--color-prettylights-syntax-markup-ignored-bg:#0550ae;--color-prettylights-syntax-meta-diff-range:#8250df;--color-prettylights-syntax-sublimelinter-gutter-mark:#8c959f;}div#\:\$p > svg > foreignObject > section [data-theme=dark],div#\:\$p > svg > foreignObject > section:where(.invert){color-scheme:dark;--focus-outlineColor:#1f6feb;--fgColor-default:#e6edf3;--fgColor-muted:#8d96a0;--fgColor-accent:#4493f8;--fgColor-success:#3fb950;--fgColor-attention:#d29922;--fgColor-danger:#f85149;--fgColor-done:#ab7df8;--bgColor-default:#0d1117;--bgColor-muted:#161b22;--bgColor-neutral-muted:#6e768166;--bgColor-attention-muted:#bb800926;--borderColor-default:#30363d;--borderColor-muted:#30363db3;--borderColor-neutral-muted:#6e768166;--borderColor-accent-emphasis:#1f6feb;--borderColor-success-emphasis:#238636;--borderColor-attention-emphasis:#9e6a03;--borderColor-danger-emphasis:#da3633;--borderColor-done-emphasis:#8957e5;--color-prettylights-syntax-comment:#8b949e;--color-prettylights-syntax-constant:#79c0ff;--color-prettylights-syntax-constant-other-reference-link:#a5d6ff;--color-prettylights-syntax-entity:#d2a8ff;--color-prettylights-syntax-storage-modifier-import:#c9d1d9;--color-prettylights-syntax-entity-tag:#7ee787;--color-prettylights-syntax-keyword:#ff7b72;--color-prettylights-syntax-string:#a5d6ff;--color-prettylights-syntax-variable:#ffa657;--color-prettylights-syntax-brackethighlighter-unmatched:#f85149;--color-prettylights-syntax-brackethighlighter-angle:#8b949e;--color-prettylights-syntax-inv
< / style > < / head > < body > < div class = "bespoke-marp-osc" > < button data-bespoke-marp-osc = "prev" tabindex = "-1" title = "Previous slide" > Previous slide< / button > < span data-bespoke-marp-osc = "page" > < / span > < button data-bespoke-marp-osc = "next" tabindex = "-1" title = "Next slide" > Next slide< / button > < button data-bespoke-marp-osc = "fullscreen" tabindex = "-1" title = "Toggle fullscreen (f)" > Toggle fullscreen< / button > < button data-bespoke-marp-osc = "presenter" tabindex = "-1" title = "Open presenter view (p)" > Open presenter view< / button > < / div > < div id = ":$p" > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "1" lang = "en-US" >
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< h1 id = "grammar-of-graphics-with-altair" > Grammar of Graphics with Altair< / h1 >
< h2 id = "capp-30239" > CAPP 30239< / h2 >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "2" lang = "en-US" >
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< h2 id = "today" > Today< / h2 >
< ul >
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< li > What is a < strong > grammar of graphics< / strong > and how do we use it in practice?< / li >
< li > What < strong > types of data< / strong > do we encounter, and how does that affect visualizations?< / li >
< li > Introduction to < strong > Altair< / strong > < / li >
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< / ul >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "3" lang = "en-US" >
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< h2 id = "grammar-of-graphics" > Grammar of Graphics< / h2 >
< p > Hadley Wickham, creator of < code > ggplot2< / code > and < code > tidyverse< / code > , < a href = "http://vita.had.co.nz/papers/layered-grammar.pdf" > " A Layered Grammar of Graphics" < / a > .< / p >
< p > Key Idea: move beyond pre-defined composites like " scatter plot" and " bar chart" into a composable grammar from which we can construct a wide variety of visualizations.< / p >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "4" lang = "en-US" >
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< h2 id = "wickhams-components" > Wickham's Components:< / h2 >
< ol >
< li >
< p > data and aesthetic mappings,< / p >
< / li >
< li >
< p > one or more layers, each with< / p >
< ul >
< li > a geometric object (line, point, etc.)< / li >
< li > (optional) statistical transformation< / li >
< li > (optional) position adjustment< / li >
< / ul >
< / li >
< li >
< p > one scale per aesthetic mapping (color, size, etc.)< / p >
< / li >
< li >
< p > a coordinate system< / p >
< / li >
< li >
< p > facet specification< / p >
< / li >
< / ol >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "5" lang = "en-US" >
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< h2 id = "types-of-data" > Types of Data< / h2 >
< h3 id = "n---nominal" > < strong > N< / strong > - Nominal< / h3 >
< p > " strings" with no < strong > order< / strong > (alphabetical does not count)< / p >
< p > Species< br / >
States< br / >
Countries< / p >
< h3 id = "o---ordered" > < strong > O< / strong > - Ordered< / h3 >
< ul >
< li > Grades: A, B, C, D, E, F< / li >
< li > Rankings: 1st, 2nd, 3rd< / li >
< / ul >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "6" lang = "en-US" >
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< h2 id = "types-of-data-quantitative" > Types of Data (Quantitative)< / h2 >
< h3 id = "q---interval-arbitrary-zero" > < strong > Q< / strong > - Interval (arbitrary zero)< / h3 >
< ul >
< li > Dates (1 CE, Jan 1 1970, or...)< / li >
< li > Location (lat, lon)< / li >
< / ul >
< p > Only differences matter, can't compare ratios.< br / >
< em > (What is 2024 / 1990?)< / em > < / p >
< h3 id = "temporal" > < strong > T< / strong > emporal< / h3 >
< p > Some systems (like Altair) will also offer this option specifically for dates and times.< / p >
< h3 id = "q---ratio-zero-fixed" > < strong > Q< / strong > - Ratio (zero fixed)< / h3 >
< p > Physical measurements, counts, amounts.< / p >
< p > " 4 km is < em > twice as far< / em > as 2 km" < / p >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "7" lang = "en-US" >
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< h2 id = "types-of-data-operations" > Types of Data (Operations)< / h2 >
< table >
< thead >
< tr >
< th > < / th >
< th > =, !=< / th >
< th > < , > , < =, > =< / th >
< th > +, -< / th >
< th > ÷< / th >
< / tr >
< / thead >
< tbody >
< tr >
< td > Nominal< / td >
< td > ✓< / td >
< td > < / td >
< td > < / td >
< td > < / td >
< / tr >
< tr >
< td > Ordered< / td >
< td > ✓< / td >
< td > ✓< / td >
< td > < / td >
< td > < / td >
< / tr >
< tr >
< td > Interval< / td >
< td > ✓< / td >
< td > ✓< / td >
< td > ✓< / td >
< td > < / td >
< / tr >
< tr >
< td > Ratio< / td >
< td > ✓< / td >
< td > ✓< / td >
< td > ✓< / td >
< td > ✓< / td >
< / tr >
< / tbody >
< / table >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "8" lang = "en-US" >
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< h2 id = "data-model-to-n-o-q" > Data Model to N, O, Q< / h2 >
< ul >
< li > string?< / li >
< li > bool?< / li >
< li > float/int?< / li >
< / ul >
< p > Possible exceptions?< / p >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "9" lang = "en-US" >
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< h2 id = "data-model-to-n-o-q-1" > Data Model to N, O, Q< / h2 >
< p > < em > Typically:< / em > < / p >
< ul >
< li > string - nominal or ordered< / li >
< li > bool - nominal< / li >
< li > float/int - interval or ratio< / li >
< / ul >
< p > Possible Exceptions?< / p >
< ul >
< li > Numeric IDs< / li >
< li > ZIP Codes< / li >
< li > ratio data stored with units (e.g. " 10km" )< / li >
< / ul >
< / section >
2024-10-11 17:38:17 +00:00
< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "10" lang = "en-US" >
2024-09-26 04:41:41 +00:00
< h2 id = "mapping-of-variables-to-aesthetics" > Mapping of Variables to Aesthetics< / h2 >
< ul >
< li > position (X, Y, Z)< / li >
< li > length< / li >
< li > angle< / li >
< li > slope< / li >
< li > area< / li >
< li > volume< / li >
< li > density< / li >
< li > hue< / li >
< li > saturation< / li >
< li > texture< / li >
< li > connection< / li >
< li > containment/grouping< / li >
< li > shape< / li >
< / ul >
< / section >
2024-10-11 17:38:17 +00:00
< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "11" lang = "en-US" >
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< h3 id = "mackinlays-effectiveness" > Mackinlay's " effectiveness" < / h3 >
< p > < img src = "effectiveness.png" alt = "" style = "width:800px;" / > < / p >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "12" lang = "en-US" >
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< h2 id = "altair" > Altair< / h2 >
< p > Altair is a Python visualization library that allows us to work from a grammar of graphics perspective.< / p >
< p > It also is very flexible in output formats, which will be useful if you want to modify your graphics or make them interactive.< / p >
< p > Altair is built on top of < strong > Vega-Lite< / strong > .< / p >
< p > Vega-Lite is a system that represents graphics in a JSON schema, and a set of tools that convert these JSON representations to images or interactive graphics.< / p >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "13" lang = "en-US" >
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< h2 id = "vega-lite-example" > Vega-Lite Example< / h2 >
< pre is = "marp-pre" data-auto-scaling = "downscale-only" > < code class = "language-json" > < span class = "hljs-punctuation" > {< / span >
< span class = "hljs-attr" > " $schema" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-string" > " https://vega.github.io/schema/vega-lite/v5.json" < / span > < span class = "hljs-punctuation" > ,< / span >
< span class = "hljs-attr" > " description" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-string" > " A scatterplot showing horsepower and miles per gallons for various cars." < / span > < span class = "hljs-punctuation" > ,< / span >
< span class = "hljs-attr" > " data" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-punctuation" > {< / span > < span class = "hljs-attr" > " url" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-string" > " data/cars.json" < / span > < span class = "hljs-punctuation" > }< / span > < span class = "hljs-punctuation" > ,< / span >
< span class = "hljs-attr" > " mark" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-string" > " point" < / span > < span class = "hljs-punctuation" > ,< / span >
< span class = "hljs-attr" > " encoding" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-punctuation" > {< / span >
< span class = "hljs-attr" > " x" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-punctuation" > {< / span > < span class = "hljs-attr" > " field" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-string" > " Horsepower" < / span > < span class = "hljs-punctuation" > ,< / span > < span class = "hljs-attr" > " type" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-string" > " quantitative" < / span > < span class = "hljs-punctuation" > }< / span > < span class = "hljs-punctuation" > ,< / span >
< span class = "hljs-attr" > " y" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-punctuation" > {< / span > < span class = "hljs-attr" > " field" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-string" > " Miles_per_Gallon" < / span > < span class = "hljs-punctuation" > ,< / span > < span class = "hljs-attr" > " type" < / span > < span class = "hljs-punctuation" > :< / span > < span class = "hljs-string" > " quantitative" < / span > < span class = "hljs-punctuation" > }< / span >
< span class = "hljs-punctuation" > }< / span >
< span class = "hljs-punctuation" > }< / span >
< / code > < / pre >
< p > Vega condenses several of the different pieces of the grammar to < em > " encoding channels" < / em > .< / p >
< / section >
2024-10-11 17:38:17 +00:00
< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "14" lang = "en-US" >
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< p > < img src = "vega.png" alt = "" / > < / p >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "15" lang = "en-US" >
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< h2 id = "altair-1" > Altair< / h2 >
< pre is = "marp-pre" data-auto-scaling = "downscale-only" > < code class = "language-python" > < span class = "hljs-keyword" > import< / span > pandas < span class = "hljs-keyword" > as< / span > pd
< span class = "hljs-keyword" > import< / span > altair < span class = "hljs-keyword" > as< / span > alt
df = pd.read_csv(< span class = "hljs-string" > " cars.csv" < / span > )
alt.Chart(df).encode(
x=< span class = "hljs-string" > " Horsepower:Q" < / span > , < span class = "hljs-comment" > # shorthand for simple features< / span >
alt.Y(< span class = "hljs-string" > " Miles_per_Gallon:Q" < / span > ).title(< span class = "hljs-string" > " Miles Per Gallon" < / span > ), < span class = "hljs-comment" > # longer form w/ customization< / span >
)
< / code > < / pre >
< p > Altair is a Pythonic wrapper to create Vega-Lite JSON. If you use it in a notebook, the resulting graphs will render inline.< / p >
< / section >
2024-10-11 17:38:17 +00:00
< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "16" lang = "en-US" >
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< h2 id = "altair-notebook" > Altair Notebook< / h2 >
< / section >
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< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "17" lang = "en-US" >
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< h2 id = "learning-altair" > Learning Altair< / h2 >
< p > To master a library like Altair, you'll go through the following phases:< / p >
< ol >
< li > Learn the key concepts.
< ul >
< li > Goal: Understand how the authors of Altair think about visualization.< / li >
< li > Achieved by: Reading user guide & watching tutorials.< / li >
< / ul >
< / li >
< li > Internalize concepts & API.
< ul >
< li > Goal: Be able to do common tasks without referring to documentation. (You'll always lean on documentation for specifics.)< / li >
< li > Achieved by: Working on assignments & experimentation. Reading API reference as needed.< / li >
< / ul >
< / li >
< li > Mastery (not this quarter!)
< ul >
< li > Goal: Be able to manipulate library to achieve most tasks. Understand limits.< / li >
< li > Achieved by: Regular use over months/years. Reading API reference and/or source code.< / li >
< / ul >
< / li >
< / ol >
< / section >
2024-10-11 17:38:17 +00:00
< / foreignObject > < / svg > < svg data-marpit-svg = "" viewBox = "0 0 1280 720" > < foreignObject width = "1280" height = "720" > < section id = "18" lang = "en-US" >
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< h2 id = "altair-assignment" > Altair Assignment< / h2 >
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< / section >
2024-11-13 23:50:35 +00:00
< script > ! f u n c t i o n ( ) { " u s e s t r i c t " ; c o n s t t = { h 1 : { p r o t o : ( ) = > H T M L H e a d i n g E l e m e n t , a t t r s : { r o l e : " h e a d i n g " , " a r i a - l e v e l " : " 1 " } , s t y l e : " d i s p l a y : b l o c k ; f o n t - s i z e : 2 e m ; m a r g i n - b l o c k - s t a r t : 0 . 6 7 e m ; m a r g i n - b l o c k - e n d : 0 . 6 7 e m ; m a r g i n - i n l i n e - s t a r t : 0 p x ; m a r g i n - i n l i n e - e n d : 0 p x ; f o n t - w e i g h t : b o l d ; " } , h 2 : { p r o t o : ( ) = > H T M L H e a d i n g E l e m e n t , a t t r s : { r o l e : " h e a d i n g " , " a r i a - l e v e l " : " 2 " } , s t y l e : " d i s p l a y : b l o c k ; f o n t - s i z e : 1 . 5 e m ; m a r g i n - b l o c k - s t a r t : 0 . 8 3 e m ; m a r g i n - b l o c k - e n d : 0 . 8 3 e m ; m a r g i n - i n l i n e - s t a r t : 0 p x ; m a r g i n - i n l i n e - e n d : 0 p x ; f o n t - w e i g h t : b o l d ; " } , h 3 : { p r o t o : ( ) = > H T M L H e a d i n g E l e m e n t , a t t r s : { r o l e : " h e a d i n g " , " a r i a - l e v e l " : " 3 " } , s t y l e : " d i s p l a y : b l o c k ; f o n t - s i z e : 1 . 1 7 e m ; m a r g i n - b l o c k - s t a r t : 1 e m ; m a r g i n - b l o c k - e n d : 1 e m ; m a r g i n - i n l i n e - s t a r t : 0 p x ; m a r g i n - i n l i n e - e n d : 0 p x ; f o n t - w e i g h t : b o l d ; " } , h 4 : { p r o t o : ( ) = > H T M L H e a d i n g E l e m e n t , a t t r s : { r o l e : " h e a d i n g " , " a r i a - l e v e l " : " 4 " } , s t y l e : " d i s p l a y : b l o c k ; m a r g i n - b l o c k - s t a r t : 1 . 3 3 e m ; m a r g i n - b l o c k - e n d : 1 . 3 3 e m ; m a r g i n - i n l i n e - s t a r t : 0 p x ; m a r g i n - i n l i n e - e n d : 0 p x ; f o n t - w e i g h t : b o l d ; " } , h 5 : { p r o t o : ( ) = > H T M L H e a d i n g E l e m e n t , a t t r s : { r o l e : " h e a d i n g " , " a r i a - l e v e l " : " 5 " } , s t y l e : " d i s p l a y : b l o c k ; f o n t - s i z e : 0 . 8 3 e m ; m a r g i n - b l o c k - s t a r t : 1 . 6 7 e m ; m a r g i n - b l o c k - e n d : 1 . 6 7 e m ; m a r g i n - i n l i n e - s t a r t : 0 p x ; m a r g i n - i n l i n e - e n d : 0 p x ; f o n t - w e i g h t : b o l d ; " } , h 6 : { p r o t o : ( ) = > H T M L H e a d i n g E l e m e n t , a t t r s : { r o l e : " h e a d i n g " , " a r i a - l e v e l " : " 6 " } , s t y l e : " d i s p l a y : b l o c k ; f o n t - s i z e : 0 . 6 7 e m ; m a r g i n - b l o c k - s t a r t : 2 . 3 3 e m ; m a r g i n - b l o c k - e n d : 2 . 3 3 e m ; m a r g i n - i n l i n e - s t a r t : 0 p x ; m a r g i n - i n l i n e - e n d : 0 p x ; f o n t - w e i g h t : b o l d ; " } , s p a n : { p r o t o : ( ) = > H T M L S p a n E l e m e n t } , p r e : { p r o t o : ( ) = > H T M L E l e m e n t , s t y l e : " d i s p l a y : b l o c k ; f o n t - f a m i l y : m o n o s p a c e ; w h i t e - s p a c e : p r e ; m a r g i n : 1 e m 0 ; - - m a r p - a u t o - s c a l i n g - w h i t e - s p a c e : p r e ; " } } , e = " d a t a - m a r p - a u t o - s c a l i n g - w r a p p e r " , i = " d a t a - m a r p - a u t o - s c a l i n g - s v g " , n = " d a t a - m a r p - a u t o - s c a l i n g - c o n t a i n e r " ; c l a s s s e x t e n d s H T M L E l e m e n t { c o n t a i n e r ; c o n t a i n e r S i z e ; c o n t a i n e r O b s e r v e r ; s v g ; s v g C o m p u t e d S t y l e ; s v g P r e s e r v e A s p e c t R a t i o = " x M i n Y M i d m e e t " ; w r a p p e r ; w r a p p e r S i z e ; w r a p p e r O b s e r v e r ; c o n s t r u c t o r ( ) { s u p e r ( ) ; c o n s t t = t = > ( [ e ] ) = > { c o n s t { w i d t h : i , h e i g h t : n } = e . c o n t e n t R e c t ; t h i s [ t ] = { w i d t h : i , h e i g h t : n } , t h i s . u p d a t e S V G R e c t ( ) } ; t h i s . a t t a c h S h a d o w ( { m o d e : " o p e n " } ) , t h i s . c o n t a i n e r O b s e r v e r = n e w R e s i z e O b s e r v e r ( t ( " c o n t a i n e r S i z e " ) ) , t h i s . w r a p p e r O b s e r v e r = n e w R e s i z e O b s e r v e r ( ( ( . . . e ) = > { t ( " w r a p p e r S i z e " ) ( . . . e ) , t h i s . f l u s h S v g D i s p l a y ( ) } ) ) } s t a t i c g e t o b s e r v e d A t t r i b u t e s ( ) { r e t u r n [ " d a t a - d o w n s c a l e - o n l y " ] } c o n n e c t e d C a l l b a c k ( ) { t h i s . s h a d o w R o o t . i n n e r H T M L = ` \ n < s t y l e > \ n s v g [ $ { i } ] { d i s p l a y : b l o c k ; w i d t h : 1 0 0 % ; h e i g h t : a u t o ; v e r t i c a l - a l i g n : t o p ; } \ n s p a n [ $ { n } ] { d i s p l a y : t a b l e ; w h i t e - s p a c e : v a r ( - - m a r p - a u t o - s c a l i n g - w h i t e - s p a c e , n o w r a p ) ; w i d t h : m a x - c o n t e n t ; } \ n < / s t y l e > \ n < d i v $ { e } > \ n < s v g p a r t = " s v g " $ { i } > \ n < f o r e i g n O b j e c t > < s p a n $ { n } > < s l o t > < / s l o t > < / s p a n > < / f o r e i g n O b j e c t > \ n < / s v g > \ n < / d i v > \ n ` . s p l i t ( / \ n \ s * / ) . j o i n ( " " ) , t h i s . w r a p p e r = t h i s . s h a d o w R o o t . q u e r y S e l e c t o r ( ` d i v [ $ { e } ] ` ) ? ? v o i d 0 ; c o n s t t = t h i s . s v g ; t h i s . s v g = t h i s . w r a p p e r ? . q u e r y S e l e c t o r ( ` s v g [ $ { i } ] ` ) ? ? v o i d 0 , t h i s . s v g ! = = t & & ( t h i s . s v g C o m p u t e d S t y l e = t h i s . s v g ? w i n d o w . g e t C o m p u t e d S t y l e ( t h i s . s v g ) : v o i d 0 ) , t h i s . c o n t a i n e r = t h i s . s v g ? . q u e r y S e l e c t o r ( ` s p a n [ $ { n } ] ` ) ? ? v o i d 0 , t h i s . o b s e r v e ( ) } d i s c o n n e c t e d C a l l b a c k ( ) { t h i s . s v g = v o i d 0 , t h i s . s v g C o m p u t e d S t y l e = v o i d 0 , t h i s . w r a p p e r = v o i d 0 , t h i s . c o n t a i n e r = v o i d 0 , t h i s . o b s e r v e ( ) } a t t r i b u t e C h a n g e d C a l l b a c k ( ) { t h i s . o b s e r v e ( ) } f l u s h S v g D i s p l a y ( ) { c o n s t { s v g : t } = t h i s ; t & & ( t . s t y l e . d i s p l a y = " i n l i n e " , r e q u e s t A n i m a t i o n F r a m e ( ( ( ) = > { t . s t y l e . d i s p l a y = " " } ) ) ) } o b s e r v e ( ) { t h i s . c o n t a i n e r O b s e r v e r . d i s c o n n e c t ( ) , t h i s . w r a p p e r O b s e r v e r . d i s c o n n e c t ( ) , t h i s . w r a p p e r & & t h i s . w r a p p e r O b s e r v e r . o b s e r v e ( t h i s . w r a p p e r ) , t h i s . c o n t a i n e r & & t h i s . c o n t a i n e r O b s e r v e r . o b s e r v e ( t h i s . c o n t a i n e r ) , t h i s . s v g C o m p u t e d S t y l e & & t h i s . o b s e r v e S V G S t y l e ( t h i s . s v g C o m p u t e d S t y l e ) } o b s e r v e S V G S t y l e ( t ) { c o n s t e = ( ) = > { c o n s t i = ( ( ) = > { c o n s t e = t . g e t P r o p e r t y V a l u e ( " - - p r e s e r v e - a s p e c t - r a t i o " ) ; i f ( e ) r e t u r n e . t r i m ( ) ; r e t u r n ` x $ { ( ( { t e x t A l i g n : t , d i r e c t i o n : e } ) = > { i f ( t . e n d s W i t h ( " l e f t " ) ) r e t u r n " M i n " ; i f ( t . e n d s W i t h ( " r i g h t " ) ) r e t u r n " M a x " ; i f ( " s t a r t " = = = t | | " e n d " = = = t ) { l e t i = " r t l " = = = e ; r e t u r n " e n d " = = = t & & ( i = ! i ) , i ? " M a x " : " M i n " } r e t u r n " M i d " } ) ( t ) } Y M i d m e e t ` } ) ( ) ; i ! = = t h i s . s v g P r e s e r v e A s p e c t R a t i o & & ( t h i s . s v g P r e s e r v e A s p e c t R a t i o = i , t h i s . u p d a t e S V G R e c t ( ) ) , t = = = t h i s . s v g C o m p u t e d S t y l e & & r e q u e s t A n i m a t i o n F r a m e ( e ) } ; e ( ) } u p d a t e S V G R e c t ( ) { l e t t = M a t h . c e i l ( t h i s . c o n t a i n e r S i z e ? . w
< / script > < / foreignObject > < / svg > < / div > < div class = "bespoke-marp-note" data-index = "15" tabindex = "0" > < p > at this point, see the marimo notebook in this directory< / p > < / div > < div class = "bespoke-marp-note" data-index = "17" tabindex = "0" > < p > walk through of assignment setup & how it'll be graded< / p > < / div > < script > / * ! ! L i c e n s e : h t t p s : / / u n p k g . c o m / @ m a r p - t e a m / m a r p - c l i @ 4 . 0 . 3 / l i b / b e s p o k e . j s . L I C E N S E . t x t * /
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