[R] Please Help. Subtraction of Matrices?
gbarlow at bellsouth.net
Thu Oct 31 04:58:33 CET 2002
I am just beginning to learn R. Please help. I have two matrices. One 20
columns by 16 rows represent student responses on a 20 question test. The
second is 20 by 16 representing the correct responses 16
times. Subtracting one from the other should yield 0's if a response is
correct. Yet Response minus Bigkey doesn't work. Documents indicate
vectors should add and subtract, and seem to imply matrix algebra should
also work. How can I do this? Can you help, and save me a great deal of
time and trial-and-error. Thanks for any help.--Gene Barlow, Ft. Lauderdale FL.
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