How to skip an error in a loop

Question

I want to skip an error (if there is any) in a loop and continue the next iteration. I want to compute 100 inverse matrices of a 2 by 2 matrix with elements randomly sampled

Answer 1

The documentation for try explains your problem pretty well. I suggest you go through it completely.

Edit: The documentation example looked pretty straightforward and very similar to the op's question. Thanks for the suggestion though. Here goes the answer following the example in the documentation page:

# `idx` is used as a dummy variable here just to illustrate that
# all 100 entries are indeed calculated. You can remove it.
set.seed(1)
mat_inv <- function(idx) {
    print(idx)
    x <- matrix(sample(0:2, 4, replace = T), nrow = 2)
    solve(x)
}
inverses <- lapply(1:100, function(idx) try(mat_inv(idx), TRUE))