More efficient matplotlib stacked bar chart - how to calculate bottom values

Question

I need some help making a set of stacked bar charts in python with matlibplot. My basic code is below but my problems is how to generate the value for bottom fo

Answer 1

I have just recently faced the same problem. Afterwards I decided to wrap it all up in a nice class. For anyone interested you get an implementation of a stacked bar graph class here:

https://github.com/minillinim/stackedBarGraph

It allows scaled stacked graphs as well as setting bar widths and set heights (with scaled inners).

Given a data set like this:

    d = np.array([[101.,0.,0.,0.,0.,0.,0.],
                  [92.,3.,0.,4.,5.,6.,0.],
                  [56.,7.,8.,9.,23.,4.,5.],
                  [81.,2.,4.,5.,32.,33.,4.],
                  [0.,45.,2.,3.,45.,67.,8.],
                  [99.,5.,0.,0.,0.,43.,56.]])

    d_heights = [1.,2.,3.,4.,5.,6.]
    d_widths = [.5,1.,3.,2.,1.,2.]
    d_labels = ["fred","julie","sam","peter","rob","baz"]
    d_colors = ['#2166ac',
                '#fee090',
                '#fdbb84',
                '#fc8d59',
                '#e34a33',
                '#b30000',
                '#777777']

It can make images like this:

GPLv3 with love.