在数据框中逐行添加列总和

问题描述

我想一次添加一行数据框的列的总和.

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

所以对于每一行，我想计算它上面的列的总和.

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

是否有一种优雅的方法可以通过 colSums 和 apply(或 sapply、rollapply)的组合来做到这一点?我一直在尝试其中的几种组合，但无法完全弄清楚.

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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