How to use lambda to change the values in dataframe?-CodePudding

I've tried to scale the values in the dataframe by a factor of 10 to the 6th power, but the results don't show any change.

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Energy['Energy Supply'].apply(lambda x: x*(10**6))
Energy.head()

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CodePudding user response：

You don't need to use apply, just use compound assignment operators:

Energy['Energy Supply'] *= 1e6

CodePudding user response：

You have to add the = operator. DataFrames are not mutable like lists, therefore you have to store the value in the column: Energy['Energy Supply'] = ....

Energy['Energy Supply'] = Energy['Energy Supply'].apply(lambda x: x*(10**6))
Energy.head()