Question

In R: How do I perform a log operation on every element of a matrix without using a loop?

I have a matrix m and I want each element to be replaced by its log.
log(m) doesn’t work.

params = array(list(),c(2, 2))

then I manually set all elements.

params

[,1] [,2]

[1,] 3 3

[2,] 3 3

log(params)

Error in log(params) : Non-numeric argument to mathematical function

Answer 1

log(M) works for all of us on correct matrices:

R> M <- matrix(1:4,2)
R> M
     [,1] [,2]
[1,]    1    3
[2,]    2    4
R> log(M)
        [,1]   [,2]
[1,] 0.00000 1.0986
[2,] 0.69315 1.3863
R> 

Can you show us your M ?