I need to count the occurrence of each value in one column and group it by values in another. How would I do this?
我需要计算一列中每个值的出现次数,并将其按另一列中的值进行分组。我该怎么办?
I need to count the occurrence of each value in one column and group it by values in another. How would I do this?
我需要计算一列中每个值的出现次数,并将其按另一列中的值进行分组。我该怎么办?