What would be the R script to reshape a 6 ×24 numeric matrix, say tmp, into...
What would be the R script to reshape a 6 ×24 numeric matrix, say tmp, into a 8 × 6 × 3 array?
A. matrix(tmp,8,6,3) B. array(matrix(tmp,8,6,3)) C. array(tmp, dim=c(8,6,3)) D. as.array(tmp,8,6,3) E. array(tmp, dim=c(3,6,8))
Homework Answers
The answer to the above problem is as follows-
The correct option is C.array(tmp, dim=c(8,6,3))
The options along with explanation is as follows-
A. matrix(tmp,8,6,3) - Wrong option
Reason - This statement changes the 8*24 matrix to a dimension of 8*6 matrix
B. array(matrix(tmp,8,6,3)) - Wrong option.
Reason - This statement changes the 8*24 matrix to an array of length 48.
C.array(tmp, dim=c(8,6,3)) - CORRECT ANSWER
Explanation - This statement changes the 8*24 matrix to a 8*6*3 dimensional array.
D. as.array(tmp,8,6,3) - Wrong option
Reason - This statement changes the 8*24 matrix to an array of dimension 8*24.So the dimension does not change.
E. array(tmp, dim=c(3,6,8)) - Wrong option.
Reason - This statement changes the 8*24 matrix to an array of dimension 3*6*8. And not 8*6*3. So this is also incorrect option.
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