pandas 熊猫图值以降序方式计算条形图
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pandas plot value counts barplot in descending manner
提问by jxn
I have a dataframe where i am trying to count the occurrence of each value. I plot it as horizontal bar but cant get it to be sorted.
我有一个数据框，我试图在其中计算每个值的出现次数。我将其绘制为水平条，但无法对其进行排序。
df = pd.DataFrame(['A','A','A','B','B','C'],columns = ['letters'])
df.value_counts()
A 3
B 2
C 1
How can i get it sorted in a descending manner?
我怎样才能以降序方式对其进行排序？
回答by A.Gharbi
You can do it by changing your plotting line like this
你可以通过像这样改变你的绘图线来做到这一点
df.letters.value_counts().sort_values().plot(kind = 'barh')
回答by Peter Leimbigler
This might count as a bit of a hack, but try this:
这可能算作有点黑客，但试试这个：
df.letters.value_counts().sort_index(ascending=False).plot(kind='barh')
