Home/ Questions/Q 9136167
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-17T08:55:03+00:00

I woud like to apply the following function to a vector instead of a

  • 0

I woud like to apply the following function to a vector instead of a matrix where the vector consists of >100 entries and I would like to add them starting from the third element and adding every second element.

apply(vector,1,function(x) sum(x[seq(3,length(x),2)]))

A quick example would be:

a: 123 4 100 3 594 5 302 ....

What would be added is 100+594+302+…

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    What about this?

    v <- 1:10 # an example vector

sum(v[-1][c(FALSE, TRUE)])
# [1] 24
    • 0