R: Get the row and column name of the minimum element of a matrix but with minimum != 0

Question

I've got a matrix with a lot of zeros and with positive numerical values. I want to get the row and column number for which the element is the minimal NONZERO value of the matrix.

I don't find that min() has extra options to exclude zero, so how can I handle this?

Answer 1

Seems like there could be a shorter answer but u can replace the zeros with NA and use na.rm=T

test = matrix(c(0:9,0:9),nrow =4,ncol=5)
test[which(test==0)] = NA
minValue = min(test,na.rm=T) 
rows = which(apply(test,1,min,na.rm=T)==minValue)
cols = which(apply(test,2,min,na.rm=T)==minValue)

Allows for duplicates