row
Represents a row in a matrix.
Syntax
-
row(A, n)-
Ais a matrix -
nis 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 nth 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⎠