Simple way to color bar chart

[textplusdata]

Hi.
I'm trying to color a stacked bar chart, and I've looked at some other complicated solutions, but I need something simple!

I am trying this which seems to be a hotch-potch of code. I've tried the selectAll with about every combination: rect.bar, rect.stack, g.rect.bar etc.

.renderlet(function(chart){
       chart.selectAll("g.rect.stack").attr("fill", function(d){
            if(d.key == "a) Free")   
         return "green-bar";
    else if(d.key == "b) Partly Free")
         return "yellow-bar";
     else if(d.key == "c) Not Free")
         return "red-bar"; 
        });})

Anyone help me get over this?

[textplusdata]

Hi,

I ended up solving this using the css way. Here it is summarised for anyone else trying to do it:

(Assumes trying to show stacks for three categories by year, totalling their "value", by year "yearDimension")

var category1sum = yearDimension.group().reduceSum(function(d){return d.category=="category1"?d.value:0;});
var category2sum = yearDimension.group().reduceSum(function(d){return d.category=="category2"?d.value:0;});
var category3sum = yearDimension.group().reduceSum(function(d){return d.category=="category3"?d.value:0;});

This means that it creates a bunch of zero values in a stack so that stack0 always remains the same colour, even if there are no values in that stack (the bottom stack would normally default to stack0, even if that botom stack was category1 rather than category2
Then for the chart I did this:

.dimension(yearDimension)
                    .group(category1Sum)
                    .stack(category2Sum)
                    .stack(category3Sum)

And then in the css, this, where stack0 = category1, stack1= category2 and stack2=category3

.dc-chart rect.stack0 {
    fill: green;
    stroke: none;
}

.dc-chart rect.stack1 {
    fill: yellow;
    stroke: none;
}

.dc-chart rect.stack2 {
    fill: red;
    stroke: none;
}

If anyone would care to share an easier way to do it direct within dc.js I' be keen to hear it!

[NickQiZhu]

The renderlet solution should work however you need to set the fill to color instead of css class:

.renderlet(function(chart){
       chart.selectAll("g.rect.stack").attr("fill", function(d){
            if(d.key == "a) Free")   
         return "green";
    else if(d.key == "b) Partly Free")
         return "yellow";
     else if(d.key == "c) Not Free")
         return "red"; 
        });})

Also make sure remove fill setting in your css class since in some browser the css class take precedence over fill attribute.

[claud-alex]

In case anyone still runs into something like this, Nick's solution works fine for me but only operating on the chart selection with "style" rather than "attr", i.e. chart.selectAll("g.rect.stack").style("fill", etc.
No idea why, but it solved issue for me.

[rajeshr6r]

I was able to create multi-series bar chart with a twist of the renderlet technique explained above .

renderlet(function (chart) {
                        chart.selectAll('rect.bar').each(function(d){                           
                        d3.select(this).attr("fill",                            
                        (function(d){
                            var colorcode ="grey"
                                                 if(d.x[1] === "Zone1")   
                                                    colorcode ="#ff7373";
                                            else if(d.x[1] === "Zone2")
                                                    colorcode ="#b0e0e6";
                                            else if(d.x[1] === "Zone3")
                                                    colorcode ="#c0c0c0";
                                            else if(d.x[1] === "Zone4")
                                                    colorcode ="#003366";
                                            else if(d.x[1] === "Zone5")
                                                    colorcode ="#ffa500";
                                            else if(d.x[1] === "Zone6")
                                                    colorcode ="#468499";
                                            else if(d.x[1] === "Zone7")
                                                    colorcode ="#660066";   
                                                return colorcode;

                                   }))
                        }); 

            });

Note : I was using a dimension with 2 values for the series .

Thanks to all comments and feel free to use this. I think with some development over this technique could yield us a multi-bar chart within the dc.charts library .

[ozermm]

Thank you @rajeshr6r for this great contribution. For some reason, it did not work for me. Do you have a working example? Thanks.

[rajeshr6r]

Hi

I do Hv one . Will share as soon as I get to my laptop . I'm hoping you are us dc 2.0

Sent from my iPhone

On 28-May-2016, at 12:45 AM, ozermm notifications@github.com wrote:

Thank you @rajeshr6r for this great contribution. For some reason, it did not work for me. Do you have a working example? Thanks.

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You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub, or mute the thread.

[gordonwoodhull]

Note there are also a couple of PRs for grouped bar charts, if that's the intended purpose. Would appreciate some reviews of them. #1043 #984

[ozermm]

Thank you @gordonwoodhull!

[ozermm]

Hi again Rajesh,

I will be very happy if you can share you working bar chart example.

Thanks,

Murat

From: Rajesh Rajamani [mailto:notifications@github.com]
Sent: Friday, May 27, 2016 9:48 PM
To: dc-js/dc.js
Cc: ozermm; Comment
Subject: Re: [dc-js/dc.js] Simple way to color bar chart (#200)

Hi

I do Hv one . Will share as soon as I get to my laptop . I'm hoping you are us dc 2.0

Sent from my iPhone

On 28-May-2016, at 12:45 AM, ozermm notifications@github.com wrote:

Thank you @rajeshr6r for this great contribution. For some reason, it did not work for me. Do you have a working example? Thanks.

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub, or mute the thread.

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You are receiving this because you commented.
Reply to this email directly, view it on GitHub #200 (comment) , or mute the thread https://github.com/notifications/unsubscribe/ASiVRCultKLNWF32GVfHrJTDiuRa7m7tks5qF57AgaJpZM4AvNfo . https://github.com/notifications/beacon/ASiVRDvdddTQ8E7fq4oRXEAheLBhYjedks5qF57AgaJpZM4AvNfo.gif

[nitinsurana]

The renderlet solution does not work for me. Tried with both .attr & .style. The callback function never gets called.
I'm using dc 2.0.0-beta.30

[nitinsurana]

The below works instead :

chart.selectAll("g rect").style("fill", function (d) {
  if (d.layer === "Advanced")
   return "green";  //return "#898989";

[nitinsurana]

renderlet solution creates a flickering effect. Still working to figure out how to change legend colors.
Is there any way to use colorAccessor to set the stacked bar color ?

[gordonwoodhull]

Use pretransition instead of renderlet to avoid the flicker.

[nitinsurana]

Thanks @gordonwoodhull , works like a charm.

Anyone looking, here's the no flickering solution with bar color, legend color on pretransition.

var colorMap = {
                "Adv": "#006837",
                "Pro": "#a6d96a",
                "Basic": "#fee08b"
            };


.on('pretransition', function (chart) {
                    chart.selectAll("g rect").style("fill", function (d) {
                        return colorMap[d.layer];
                    });
                    chart.selectAll('g.dc-legend-item rect').style('fill', function (d) {
                        return colorMap[d.name];
                    });
                });