Change the colour of bubbles in Google visualization motion chart - api

Question

I there a way where by I can define the colours of bubbles in a motion chart provided by Google visualization API ? I do not want to use the default colour scheme.
Thank you in advance.

Answer 1

I've not found an inbuilt way to do this. However, what you can do is assign each bubble a "colour" variable. Then you can set the colour of the bubbles to this variable. I have found that for 3 bubbles, setting one to 1, another to 1.5 and the third to 3 projects reasonable well (on the default colour scheme, yellow projects very poorly). This approach gives you limited control over the colour scheme.

Answer 2

It's 2017 and I have yet to find a good update for this. So here is the solution I came up with. HTH.
#views.py
# Bubble Chart: ID, X, Y Color, Size
data.append(['ID', 'X', 'Y', 'Category', 'Z'])
data.append(['', 0, 0, 'Cat 1', 0]) #<-- the order of
data.append(['', 0, 0, 'Cat 2', 0]) #<-- these fakeout items
data.append(['', 0, 0, 'Cat 3', 0]) #<-- is important
data.append(['', 0, 0, 'Cat 4', 0]) #<-- Blue, Red, Orange, Green - in that order
... for r in source:
data.append(r.a, r.b, r.c, r.d, r.e)
return render(
request,
'Template.html',
{
'title':'',
'year':datetime.now().year,
'org': org,
'data': json.dumps(data),
}
#in the scripts block of template.html
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">
google.charts.load('current', {'packages':['corechart']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable({{data|safe}});
var options = {
title: 'Bubble By Category Strategy',
hAxis: { title: 'X', ticks: [{v: 0, f:''}, {v: 1, f:'L'}, {v: 2, f:'M'}, {v: 3, f:'H'}, {v: 4, f:''}] },
vAxis: { title: 'Y', ticks: [{v: 0, f:''}, {v: 1, f:'L'}, {v: 2, f:'M'}, {v: 3, f:'H'}, {v: 4, f:''}] },
bubble: {
textStyle: {
fontSize: 11,
fontName: 'Lato',
}
}
};
var chart = new google.visualization.BubbleChart(document.getElementById('riskChart'));
chart.draw(data, options);
}
</script>