row
Represents a row in a matrix.
Syntax

row(A, n)

A
is a matrix 
n
is a positive integer

The returned value is an lvalue.
Description
If A
is a matrix and n
is an integer between 1
and height(A)
(inclusively), then row(A, n)
represents the n
th row of A
; typewise this is a vector. row(A, n)
is an lvalue, so it may be assigned to. The value assigned to it must be a vector of dimension width(A)
. If A
is a real matrix, row(A, n)
can only be assigned a real vector.
Examples
A ≔ ❨❨2, 1, −i❩, ❨1, 0, 2❩, ❨4, i, 2❩, ❨0, 1, −1❩❩
⎛ 2 1 −i⎞ ⎜ 1 0 2⎟ ⎜ 4 i 2⎟ ⎝ 0 1 −1⎠
row(A, 1)
⎛2 ⎞ e⎜1 ⎟ ⎝−i⎠
row(A, 1) ≔ ❨10, 5, 10❩
⎛10⎞ e⎜5 ⎟ ⎝10⎠
A
⎛10 5 10⎞ ⎜ 1 0 2⎟ ⎜ 4 i 2⎟ ⎝ 0 1 −1⎠