5.49.25 Make a matrix from two matrices: semi_augment
semi_augment concat two matrices with the same number
of columns.
Input:
semi_augment([[3,4],[2,1],[0,1]],[[1,2],[4,5]])
Output:
[[3,4],[2,1],[0,1],[1,2],[4,5]]
Input:
semi_augment([[3,4,2]],[[1,2,4]])
Output:
[[3,4,2],[1,2,4]]
Note the difference with concat.
Input:
concat([[3,4,2]],[[1,2,4]]
Output:
[[3,4,2,1,2,4]]
Indeed, when the two matrices A and B have the same dimension, concat
makes a matrix with the same number of rows as A and B by
gluing them side by side.
Input:
concat([[3,4],[2,1],[0,1]],[[1,2],[4,5]]
Output:
[[3,4],[2,1],[0,1],[1,2],[4,5]]
but input:
concat([[3,4],[2,1]],[[1,2],[4,5]]
Output:
[[3,4,1,2],[2,1,4,5]]