Hi All.

I'm new to R and trying to learn the data manipulation routines.  At the
moment, this is the one that has me stumped.

Imagine n test takers provide responses to k multiple choice items.  The
result is a (n+1) x k matrix of responses where the first row of the matrix
is a correct answer key.

How could you transform the raw item responses into 1s (correct response)
and 0s (incorrect responses) by comparing each test takers response to the
correct answer key?

Any direction would be appreciated!

Rick

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