列数组上的 Value_counts()

Question

I have array = ['T4U measured','FTI measured', 'lithium'] and need to do value_counts on all these columns.

something like df[array].value_counts(), which show histogram of values in columns

Answer 1

You can use the DataFrame.hist method:

for i in range(0, len(array)):
    df[array[i]].hist(bins=df[array[i]].value_counts())

This method works on the whole dataframe, in case you don't want to call it on each column separately. But in that case, you cannot adjust the number of bins to each column.