使用值填充data.frame。如何加快这个过程？

I am currently trying to fill an empty data.frame with values that are in another data.frame. At first I intialise an empty data.frame with the corresponding dimensions and then I use a for-loop to fill this data.frame with the values, which are contained in another data.frame. Is there a way to use an apply-type-function to speed up the process?I am currently trying to fill an empty data.fra