熊猫，Matplotlib和具有3个值的堆积条形图

Question

I have the following code representing 3 values I would like to display in a stacked bar chart.

print(df.groupby(['project']).sum()['no_test_or_requirement'])
print(df.groupby(['project']).sum()['requirement_only'])
print(df.groupby(['project']).sum()['test_and_requirement'])

width = .5
fig, ax = plt.subplots(figsize=(13,9))
plt.ylabel('Count')
plt.xlabel('Project')
ax.yaxis.grid(linewidth=.5)
p1 = ax.bar(df['project'].unique(), df.groupby(['project']).sum()['no_test_or_requirement'], color='y', width=.5)
p2 = ax.bar(df['project'].unique(), df.groupby(['project']).sum()['requirement_only'], color='b', width=.5)
p3 = ax.bar(df['project'].unique(), df.groupby(['project']).sum()['test_and_requirement'], color='r', width=.5)
fig.legend((p1[0], p2[0], p3[0]), ('No Test or Requirement', 'Requirement Only', 'Test and Requirement'))
plt.show()

The following is the output from the print statements that reflect the three values in question.

project
ENTMQ      3
ENTMQBR    0
RHDM       1
RHPAM      1
Name: no_test_or_requirement, dtype: int64
project
ENTMQ      13
ENTMQBR     3
RHDM        0
RHPAM       0
Name: requirement_only, dtype: int64
project
ENTMQ      5
ENTMQBR    1
RHDM       0
RHPAM      0
Name: test_and_requirement, dtype: int64

My resulting chart will only show two values stacked and only shows "No Test or Requirement" values when the other values aren't present. The values presented are correct; however, I do expect to see "No Test or Requirement" represented in the ENTMQ and ENTMQBR bars (3 stacked values). What am I missing here?

Answer 1

This is working for me.

df2 = df.groupby(['project']).sum()

df2 = df2.drop(columns=['has_requirement', 'has_testcase'])
ax = df2.plot(kind='barh',stacked=True, figsize=(13,9),
        color=('r','g','b', 'y'))

ax.set_xlabel('Count')
ax.set_ylabel('Project')
ax.xaxis.grid(linewidth=1)
plt.show()