Question

I’m generating a bar chart using ReportLab VerticalBarChart. I need one of the bars (each time a different one) to be a different color than the rest, to specify it is the ‘chosen’ value.

Or else, I need to mark it differently than the other bars somehow.

Any idea how to do that?

Answer 1

Meitham’s answer didn’t work for me – it seems that chart.bars.fillColor[0] colors all the bars in a series. When you have more than one series in one chart, you can determine the color for each series by Meitham’s method.

What I ended up doing is emphasizing the label (ix is the index for the parameter I needed to single out):

...
bc = VerticalBarChart()
...
bc.categoryAxis.labels[ix].fontName = 'Times-Bold'
bc.categoryAxis.labels[ix].fontSize = 15
bc.categoryAxis.labels[ix].angle = 30
bc.categoryAxis.labels[ix].dy = -15
drawing.add(bc)

You can search for this in the reportlab user manual.