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DATA-DRIVEN DOCUMENTS VISUALIZING LIBRARY DATA WITH D3.JS Bret Davidson | NCSU Libraries

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D3.js

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AGENDA Example Why D3? Data Join API Highlights D3 @ NCSU Resources

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Trulia Trends

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WHY D3? Web Standards Capability Community

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WHY NOT D3? Learning Curve Lower Level Simpler Needs

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EXAMPLE v a r d a t a s e t = [ 2 0 , 5 , 1 0 , 0 , 5 0 ] ; d 3 . s e l e c t ( ' b o d y ' ) . s e l e c t A l l ( ' p ' ) / / s e l e c t i o n . d a t a ( d a t a s e t ) / / d a t a b i n d i n g . e n t e r ( ) / / c r e a t e e n t e r s e l e c t i o n . a p p e n d ( ' p ' ) / / d o m m a n i p u l a t i o n . s t y l e ( ' f o n t - s i z e ' , ' 5 0 p x ' ) / / s t a t i c p r o p e r t y . t e x t ( f u n c t i o n ( d , i ) { / / d y n a m i c p r o p e r t y r e t u r n i + ' : m y v a l u e i s ' + d ; } ) ;

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OUTPUT

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DATA JOIN

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DATA JOIN DEMO Demo

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ENTER + UPDATE + EXIT / / E n t e r r e c t s . e n t e r ( ) . a p p e n d ( ' r e c t ' ) ; / / U p d a t e r e c t s . a t t r ( ' x ' , 2 0 ) . a t t r ( ' y ' , f u n c t i o n ( d , i ) { r e t u r n 6 5 * i ; } ) . a t t r ( ' h e i g h t ' , ' 6 0 ' ) . a t t r ( ' w i d t h ' , f u n c t i o n ( d , i ) { r e t u r n x ( d ) ; } ) ; / / E x i t r e c t s . e x i t ( ) . r e m o v e ( ) ;

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LINEAR SCALE

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LINEAR SCALE v a r f o n t S i z e = d 3 . s c a l e . l i n e a r ( ) . d o m a i n ( [ 0 , d 3 . m a x ( d a t a s e t ) ] ) . r a n g e ( [ 2 5 , 5 0 ] ) ;

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ARRAY METHODS d 3 . m a x ( a r r a y [ , a c c e s s o r ] ) ; d 3 . m i n ( a r r a y [ , a c c e s s o r ] ) ; d 3 . e x t e n t ( a r r a y [ , a c c e s s o r ] ) ; d 3 . s u m ( a r r a y [ , a c c e s s o r ] ) ; d 3 . m e a n ( a r r a y [ , a c c e s s o r ] ) ; d 3 . m e d i a n ( a r r a y [ , a c c e s s o r ] ) ; d 3 . r a n g e ( [ s t a r t , ] s t o p [ , s t e p ] ) ; d 3 . n e s t ( ) . k e y ( f u n c t i o n ( d ) { r e t u r n d . s c h o o l } ) . e n t r i e s ( a r r a y ) ;

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OTHER SCALES power() log() quantize() quantile() threshold() ordinal() time()

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SVG GENERATORS Area Line Chord Diagonal Symbol

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LAYOUTS Force Hiearchy Histogram Pack Treemap

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AND MORE! Axes Transitions Color Scales Formatting Geography

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D3 @ NCSU lib.ncsu.edu/dli/projects/spaceassesstool

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ACKNOWLEDGMENTS Mike Bostock Scott Cheng Scott Murray

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SUMA TEAM Jason Casden Joyce Chapman Bret Davidson Rob Rucker Rusty Earl Eric McEachern lib.ncsu.edu/dli/projects/spaceassesstool

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THANK YOU! [email protected] go.ncsu.edu/c4l13-d3