熊猫连续统计类别频率

Question

The questions I see here are all about groupby and count by columns. If I have a dataframe that looks like this:

       a       b      c      d      e
0    Apple    0.3    Pear   0.4    Apple

I want to count the category frequency of these certain columns: [a,c,e] for each row and create a column for the most frequent category. In this case it would be column f, value of "Apple" since it has 2 occurrences

Answer 1

我们可以做mode

df['f']=df.loc[:,list('ace')].mode(axis=1).iloc[:,0]