如何使用 Matplotlib 在 Python 中自动订购堆叠条 plot？

Question

I am currently creating a stacked bar plot using a dataframe and I'd like to change the ordering of the bars in order of magnitude. I have a dataframe as following:

df = ( 
   H  C  O
A  2  1  3
B  1  2  1
C  3  1  1
D  1  2  3
E  1  3  1)

df.plot.bar(stacked = True).legend(loc='upper center', ncol=3)

The problem I am coming into is that the first column has priority in ordering. I would like an output that stacks bars in increasing value found in each column.

I am not opposed to sending each row into a new list, or dataframe, or indices and plotting them separately and then concatanting, but I am very new to Python.

Answer 1

Do you mean something like this:

fig, ax = plt.subplots()

colors = pd.Series({
    'H':'C0',
    'C':'C1',
    'O':'C2'
})

for i,r in df.iterrows():
    row = r.sort_values().cumsum()[::-1]
    ax.bar([i]*len(row), row, color=row.index.map(colors))

Output: