INFO 247 - Lab 7 - #1 - Draw Squares

_.md

[ Launch: INFO 247 - Lab 7 - #1 - Draw Squares ] 5113056 by akselx
[ Launch: INFO 247 - Lab 6 - #1 ] 5054734 by poezn

config.json

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inlet.js

// School of Information, UC Berkeley
// INFO 247 Lab 7: D3.js
// http://blogs.ischool.berkeley.edu/i247s13/lab-7-d3-js-part-2/ 

// get the data from the 'matrix-data.json' data file
var data = tb['matrix-data'];


// for each race, let's add a row that will eventually
// contain all squares for that particular race.
// We're using the SVG <g> element for this. <g> elements
// are invisible but can be moved around on the screen

var rows = g.selectAll("g.row")
.data(data)
.enter().append("g")
.attr({
  "class": "row",
  "transform": function(d, i) {
    var tx = 50;
    var ty = 50 + i * 50;
    return "translate(" + [tx, ty] + ")"
  }
});


// within each of these rows, let's add 9 squares (one for 
// each data point)

rows.selectAll("rect")
.data(function(d, i) { return d.values; })
.enter().append("rect")
.attr({
  "width":50,
  "height":50,
  "y":0,
  "x":function(d, i) {
    return i*50;
  }
})

// ... YOUR TURN. 
// - append a rectangle for each data point 
// - move each rectangle to appeach 50 pixels next to the previous one
// - set a stroke in order to distinguish the rectangles from each other

matrix-data.json

[
  {"race": "Asian",             "values": [22,17,20,20,26,26,25,21,29] },
  {"race": "Black",             "values": [34,28,31,34,37,34,32,39,38] },
  {"race": "Hispanic / Latin",  "values": [22,19,24,19,23,26,26,21,30] },
  {"race": "Indian",            "values": [18,21,25,18,24,27,21,33,30] },
  {"race": "Middle Eastern",    "values": [27,21,25,23,23,32,23,32,28] },
  {"race": "Native American",   "values": [31,27,29,27,36,35,34,32,34] },
  {"race": "Other",             "values": [30,24,27,28,29,32,32,35,33] },
  {"race": "Pacific Islander",  "values": [23,25,24,24,28,29,22,30,29] },
  {"race": "White",             "values": [21,21,22,20,25,27,26,23,29] }
]