How to check the type of a variable is logical in MatLab? - islogical -- MatLab

How to check the type of a variable is logical in MatLab?

[Ans]

islogical

[description]

<answer>=islogical(<b1>)

When <b1> is a logical, it returns true.

Otherwise, it returns false.

[NOTE]

Great Importance!!! Please pay a lot of attention on it.

(1)

islogical(1) and islogical(2) will return false because 2 is considered as double type.

(2)

islogical(5<7) will return true because 5<7 is a relational operator.

more details on:

logical

Convert numeric values to logicals - MATLAB logical (mathworks.com)

islogical

Determine if input is logical array - MATLAB islogical (mathworks.com)

code

clear

clc

b1=logical(1)

islogical(b1)

b2=logical(0)

islogical(b2)

b3=logical(2)

islogical(b3)

b4=logical([0 1 0 1 2 3])

islogical(b4)

b5=logical('A')

islogical(b5)

b6=logical(['A' 0 0 'B'])

islogical(b6)

%{

%compiler error

%because there is not conversion between struct and logial

s7=struct('a',2)

b7=logical(s7)

islogical(b7)

%}

b8=5

islogical(b8)

b9={2 3 4}

islogical(b9)

b10=true

islogical(b10)

b11=false

islogical(b11)

result:

b1 =

logical

1

ans =

logical

1

b2 =

logical

0

ans =

logical

1

b3 =

logical

1

ans =

logical

1

b4 =

1×6 logical array

0 1 0 1 1 1

ans =

logical

1

b5 =

logical

1

ans =

logical

1

b6 =

1×4 logical array

1 0 0 1

ans =

logical

1

b8 =

5

ans =

logical

0

b9 =

1×3 cell array

{[2]} {[3]} {[4]}

ans =

logical

0

b10 =

logical

1

ans =

logical

1

b11 =

logical

0

ans =

logical

1