"not equal to" in MATLAB

How do I use "not equal to" symbol in MATLAB?

The above code gives an error.

[Stephen23]

When I searched the internet for "MATLAB not equal" this was the first link returned:

https://www.mathworks.com/help/matlab/matlab_prog/array-comparison-with-relational-operators.html

which shows all of the element-wise logical operators, with links at the bottom to the relevant pages, e.g.:

https://www.mathworks.com/help/matlab/ref/ne.html

Did you try looking at the MATLAB documentation?

[Steven Lord]

FYI for Mobile Computing, the exclamation point (bang) has a different meaning in MATLAB.

Answer 1

[Jan]

Several possible ways:

if 1 ~= 2 

if not(1 == 2)

if ~(1==2)

if ne(1, 2)

if ~eq(1, 2)

if 1 - 2   % Implicitly evaluated:  all(1 - 2)

Answer 2

[Manvi Goel]

You can use the ~ instead of ! for not in MATLAB

[Guillaume]

"You can use..."

It's not you can. It's you have to.

Answer 3

[Jack Rigby]

~=

Answer 4

[Richard Payne]

Is there hack to accept != ?

[Steven Lord]

No. The ! operator means whatever follows will be passed to the operating system (assuming it is the first part of the command, otherwise it is an error.) You cannot change that definition. The ~ operator means logical negation, and the ~= operator means not equals.

a = ~true

a = logical
   0

b = 1 ~= 2

b = logical
   1

!date

Sun Feb 21 00:19:13 UTC 2021

Answer 5

[Prannoy]

In MATLAB, the ! operator has a separate meaning. '~' is used instead as a logical NOT operator. This means that "not equal to" will be represented by "~=" in MATLAB. I hope that clears your doubt.