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answer
CHANGED
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@@ -13,4 +13,32 @@
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ax.set_ylabel('Rate')
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plt.show()
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```
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---
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**追記**
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```Python
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import pandas as pd
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import matplotlib.pyplot as plt
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df = pd.DataFrame({'Sample No.':[1,2,3,4,5,6],
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'Black':[30,45,10,15,40,30],
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'Green': [20,30,60,40,45,45],
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'Red': [50,25,30,45,15,25]})
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df['Pos'] = [0,1,3,4,6,7]
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ax = plt.subplot()
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ax.bar(x=df['Pos'], height=df['Red'], bottom=0, color='red', label='Red')
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ax.bar(x=df['Pos'], height=df['Green'], bottom=df['Red'], color='green', label='Green')
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ax.bar(x=df['Pos'], height=df['Black'], bottom=df['Red']+df['Green'], color='black', label='Black')
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ax.set_xticks(df['Pos'])
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ax.set_xticklabels(df['Sample No.'])
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ax.set_xlabel('Sample No.')
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ax.set_ylabel('Rate')
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ax.legend()
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plt.savefig('out2.png')
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plt.show()
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```
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