CODEWITHSUNDEEP
javascriptd3.js
Rahul Desai
Rahul Desai

Reputation: 15491

How to assign random colors to D3 bar chart?

I am working on a D3 bar chart as per the mock-up below:

Bar Chart

How do I make the bars to have random colors?

jsFiddle

Code:

svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);

Upvotes: 17

Views: 20169

Answers (3)

Andy B
Andy B

Reputation: 328

this is old now, but this is a pretty good approach if you need N number of random colors

http://bl.ocks.org/jdarling/06019d16cb5fd6795edf

Upvotes: 5

Chitrasen
Chitrasen

Reputation: 1726

colors = d3.scale.category20()

rects = svg.selectAll('rect')
                .data(data)
                .enter()
                .append("rect")
                .attr("class","rect")
                .....#other attributes
                .attr("fill",function(d,i){return colors(i)})

Upvotes: 7

Unknown User
Unknown User

Reputation: 3658

d3 has 4 built in color palettes.

Here's the link for the built in color palettes.

This tutorial is good on using specific colors for specific element.

Another tutorial by Jerome Cukier.

And the official site for d3 colors.

Fiddle - Note: In the fiddle I've passed the colors by adding colors in the data.

It can even be done by passing the colors from a different variables.

Hope this helps.

Upvotes: 20

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