r - Find the maximum and minimum value of every column and then find the maximum and minimum value of every row -

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i've got matrix:

a <- matrix(rnorm(1000 * 18, mean = 100, sd = sqrt(10)), 1000, 18)

i find maximum , minimum value of every column , maximum , minimum value of every row.

figured out.

minimum , maximum of every column:

apply(a,2,min) apply(a,2,max)

minimum , maximum of every row:

apply(a,1,min) apply(a,1,max)

found information here http://www.personality-project.org/r/r.commands.html


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