pandas ValueError：在将索引与seaborn lineplot一起使用时无法解释输入“索引”
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ValueError: Could not interpret input 'index' when using index with seaborn lineplot
提问by MaxS
I want the use the index of a pandas DataFrame as x value for seaborn and is raised a value error. A small test example:
我希望使用Pandas DataFrame 的索引作为 seaborn 的 x 值并引发值错误。一个小测试示例：
import pandas as pd
import seaborn as sns
sns.lineplot(x='index',y='test',hue='test2',data=pd.DataFrame({'test':range(9),'test2':range(9)}))
It raises:
它提出：
ValueError: Could not interpret input 'index'
is it not possible to use the index as x values? What am I doing wrong? Python 2.7, seaborn 0.9
不能将索引用作 x 值吗？我究竟做错了什么？Python 2.7，seaborn 0.9
回答by Sheldore
I would rather prefer to use it this way. You need to remove hueas I assume it has a different purpose which doesn't apply in your current DataFrame because you have a single line. Visit the official docs herefor more info.
我宁愿这样使用它。您需要删除，hue因为我认为它有不同的用途，不适用于您当前的 DataFrame，因为您只有一行。请在此处访问官方文档以获取更多信息。
df=pd.DataFrame({'test':range(9),'test2':range(9)})
sns.lineplot(x=df.index, y='test', data=df)
Output
输出
回答by ImportanceOfBeingErnest
You would need to make sure the string you provide to the xargument is actually a columnin your dataframe. The easiest solution to achieve that is to reset the index of the dataframe to convert the index to a column.
您需要确保提供给x参数的字符串实际上是数据框中的一列。最简单的解决方案是重置数据帧的索引以将索引转换为列。
sns.lineplot(x='index', y='test', data=pd.DataFrame({'test':range(9),'test2':range(9)}).reset_index())
