明智地在数据框行中添加列总和 [英] Adding columns sums in dataframe row wise

问题描述

我想一次将数据框的列总和相加一次.

I would like to add the sums of the columns of my dataframe one row at a time.

因此，对于每一行，我想计算其上方各列的总和.

So for each row, I would like to compute the sum of the columns above it.

是否有结合colSums并应用(或sapply，rollapply)的优雅方法?我一直在尝试将它们组合在一起，但是还不太清楚.

Is there an elegant way to do this with a combination of colSums and apply (or sapply, rollapply)? I have been trying a couple of combinations of those, but could not quite figure it out.

推荐答案

new_df <- apply(data_frame, 2, cumsum)

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