> 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!
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