I have a chart that resembles the one shown below, however, there is a crucial component missing. Currently, my time scale follows the standard format as depicted in the first picture. I am looking to convert it to the time scale seen in the second picture. Is this achievable using D3? The version of D3.js that I am currently working with is V3.
If you are looking for a way to roll up custom time intervals on the fly using D3, you might be out of luck as there is no built-in functionality for that. However, fear not, with some basic JavaScript knowledge, you can easily achieve this...
var data = [
{date: new Date(2016, 11, 10), value: 1},
{date: new Date(2016, 11, 11), value: 2},
{date: new Date(2016, 11, 12), value: 3},
{date: new Date(2016, 11, 13), value: 3},
{date: new Date(2016, 11, 14), value: 2},
{date: new Date(2016, 11, 15), value: 3},
{date: new Date(2016, 11, 16), value: 5},
{date: new Date(2016, 11, 16), value: 4},
{date: new Date(2016, 11, 17), value: 2},
{date: new Date(2016, 11, 19), value: 3},
{date: new Date(2016, 11, 20), value: 1},
{date: new Date(2016, 11, 21), value: 3}
];
rollup(data, 3);
function rollup(data, days) {
var min = data.reduce(function(a, b) {if (b.date < a) return b.date; return a;}, new Date(3000, 1, 1)),
max = data.reduce(function(a, b) {if (b.date > a) return b.date; return a;}, new Date(1000, 1, 1)),
output = [];
for (var day = min; day < max; day.setDate(day.getDate() + days)) {
var end = new Date(day);
end.setDate(end.getDate() + days);
var working = data.filter(function(a) {return (a.date >= day && a.date < end);}),
value = working.reduce(function(a, b) {return a + b.value;}, 0);
output.push({date: day.toString() + ' - ' + end.toString(), value: value});
}
console.log(output);
return output;
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