I'm trying to use a heatmap to show error count vs software version. On the Y-axis I have all the errors that can be reported by our software. On the X-axis I have the version. I would like the percentage to be calculated based on only the documents belonging to each SW version that is shown on the X-axis. That way I can compare the error distribution between several SW versions quickly. Basically every column with different SW version on the X-value would sum up to 100 %. Like a vertical bar chart with percentage mode on the y-axis.
If I enable the percentage mode, it looks like it calculate the percentage based on the total count of documents.