`false`

Array of logical false values.

Category: Language Fundamentals > Matrices and Arrays

Syntax

F = false

Scalar false.

F = false(n)

n-by-n array of false.

F = false(m, n, ...)

Array of the given size.

F = false(sz)

Size given as a vector.

Description

false is both a constant and an array constructor. A logical array uses one byte per element, much less than a double mask, and works directly as an index. A typical pattern is to start from false(size(x)) and set the positions you want to select to true.

The companion true does the same with ones.

Input arguments

n, m, ...: Dimension sizes. Zero gives an empty array.

Output arguments

F: Logical array filled with 0.

Example

m = false(2, 3);
m(1, 2) = true;
m
class(m)

Output

m = 2×3 logical array

   0   1   0
   0   0   0
ans = 'logical'

false