I'm posting this question because I don't how to phrase it in Google :/
I have a data.table of integers
421 399 350
and I just want to add them but replace each position with the sum at that point.
So pos1 would be 421, pos2=421+399, pos3=421+399+350, etc...
my final output should look like this:
421 820 1170
Can you tell me besides answering the question how I can phrase this in english?