StackOverflow2013

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plurals

PO
primarykey
Id
13091054
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-10-26T16:45:51.653
FavoriteCount
0
LastActivityDate
2012-10-26T17:00:05.457
LastEditDate
2012-10-26T17:00:05.457
LastEditorUserId
1029936
OwnerUserId
1029936
ParentId
13075459
PostTypeId
2
Score
4
ViewCount
0
LastEditorDisplayName
text
Body
Sure, you can use the indices of a 2d array to draw a heatmap. I put together a quick example at <a href="http://jsfiddle.net/uArga/4/" rel="nofollow">http://jsfiddle.net/uArga/4/</a>. Assuming that your data looks like this: <pre><code>var data = [[3,5],[9,2]]; </code></pre> First I set up some basic scales to calculate the <code>x</code> and <code>y</code> offsets based on the size of the data and the size of the chart. This makes it easy to resize the chart by changing the <code>height</code> and <code>width</code> without having to manually recalculate how big each of the cells should be. <pre><code>var x = d3.scale.linear() .range([0, width]) .domain([0,data[0].length]); var y = d3.scale.linear() .range([0, height]) .domain([0,data.length]); </code></pre> You can then add each row to the heat map <pre><code>var row = svg.selectAll(".row") .data(data) .enter().append("svg:g") .attr("class", "row"); </code></pre> And then add each cell to the row using a subselect. There might be a cleaner way to do this but I basically just capture the row number alongside the data for each cell. I then use the scales to figure out the <code>x</code>, <code>y</code>, <code>height</code>, and <code>width</code> for each cell. <pre><code>var col = row.selectAll(".cell") .data(function (d,i) {return d.map(function(a){return {value: a, row: i};})}) .enter().append("svg:rect") .attr("class", "cell") .attr("x", function(d, i) { return x(i); }) .attr("y", function(d, i) { return y(d.row); }) .attr("width", x(1)) .attr("height", y(1)) .style("fill", function(d) { return colorScale(d.value); }); </code></pre>
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1. This table or related slice is empty.
PostParentId
1. POD3 heatmap without explicitly storing row and column
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1. USBill
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1. USBill
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1. POD3 heatmap without explicitly storing row and column
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3. VO
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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