Equivalent to rowMeans() for min()

Question

I have seen this question being asked multiple times on the R mailing list, but still could not find a satisfactory answer.

Suppose I a matrix m

Answer 1

You could use pmin, but you would have to get each column of your matrix into a separate vector. One way to do that is to convert it to a data.frame then call pmin via do.call (since data.frames are lists).

system.time(do.call(pmin, as.data.frame(m)))
#    user  system elapsed 
#   0.940   0.000   0.949 
system.time(apply(m,1,min))
#    user  system elapsed 
#   16.84    0.00   16.95