score:1
If I understand you correctly, you want to convert your data and sum all COUNT
for the same day. You can do it with d3.nest.
var dataAsCsv = `DATE OF ARREST,ARREST RESOLUTION,COUNT
01/01/1988,BONDED OUT,1
01/01/1988,BONDED OUT,1
01/01/1988,BONDED OUT,1
02/01/1988,BONDED OUT,1
02/01/1988,BONDED OUT,1`;
var data = d3.csvParse(dataAsCsv);
var parseDate = d3.timeParse("%m/%d/%Y");
var convertedData = d3.nest()
.key(function(d) { return d["DATE OF ARREST"]; })
.rollup(function(v) {
return {
date: parseDate(v[0]["DATE OF ARREST"]),
count: d3.sum(v, function(d) { return +d["COUNT"]; })
}
})
.entries(data).map(function(d) { return d.value});
console.log(convertedData);
<script src="https://d3js.org/d3.v4.min.js"></script>
Source: stackoverflow.com
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