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boolean
Scilab Objects, boolean variables and operators & | ~
Description
A boolean variable is %T
(for "true") or %F
(for "false"). These variables can be used to define matrices of booleans, with the usual syntax. Boolean matrices can be manipulated as ordinary matrices for elements extraction/insertion and concatenation.
![]() | Note that other usual operations ( + , * , - , ^ , etc) are undefined for boolean matrices. Three special operators are defined for boolean matrices: |
- ~b
is the element-wise negation of boolean
b
(matrix).- b1 & b2
is the element-wise logical
and
ofb1
andb2
(matrices).- b1 | b2
is the element-wise logical
or
ofb1
andb2
(matrices).
Boolean variables can be used for indexing matrices or vectors. For instance a([%T,%F,%T],:)
returns the submatrix made of rows 1
and 3
of a
. Boolean sparse matrices are supported.
Examples
[1,2]==[1,3] [1,2]==1 a=1:5; a(a>2)
See also
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