Convert logical variable into integer number

Hi! I think my problem is very simple. I have some boolean expressions in my code, which the results will always be 1 or 0 (true or false). Here are some examples:

data=data+(-1*(~mat(i)&&mat(j)&&mat(k)))||(~mat(i)&&~mat(j));

or

data=data+(~mat(i));

I have to convert these logicals 1s and 0s to int values. I've tried using abs() but it is not working.

Btw, I'm on R2015b.

I appreciate the help.

Thanks!

Answer 1

[Ced]

You can usually use logicals and numerical values interchangeably in matlab (for most operations), no need to convert them. But If you do, you can cast them e.g. using int8

a = logical(0); % a is a logical
b = a;          % b is a logical
c = int8(a);    % c is an int8

The same goes for other datatypes (int16, int32, double, ... ), see datatypes for details.

[Jim Morgenstern]

Actually this did not work for me ... which may be a bug in Matlab.

I have a logical array: E = uint8(zeros( ..., )); vcl = edge (A, 'canny', ...); vv = uint8(vcl); E = E + uint8(vcl);

when i do imtool(vcl), i see the pixels with edges. when i do imtool(E) it is all zero. and also imtool(vv) is all zero. I changed uint8 to double and it works correctly. possible bug?

[Stephen23]

"I changed uint8 to double and it works correctly. possible bug?"

Not at all. MATLAB assumes that UINT8 image data ranges from 0-255 (i.e. the entire 8-bit range) whereas DOUBLE image data ranges from 0-1 (i.e. normalized). This is clearly explained in the MATLAB documentation:

https://www.mathworks.com/help/images/image-types-in-the-toolbox.html

Answer 2

[Kehn Wu]

You could try sum()

Answer 3

[Marcelo Moraes]

In HDC Coder you can use the block

HDL CODER => LOGIC AND BIT OPERATIONS => BIT CONCAT

Concatenates up to 128 input words into single output - Simulink - MathWorks Benelux