Why do I get "Array indices must be positive integers or logical values" error when using "angle" function?

Hey guys, does anyone know whats wrong.

I already have my line code working. But once I run it on appdesigner.

It display "Array indices must be positive integers or logical values".

Can you guys help me pls

[Fifteen12]

Do you mean to be redefining e and e2? Right now you're not using either of those initial values...

[Jiri Hajek]

Hi, if you need some real testing from the community, you have to attach the code, not just a screenshot...

Answer 1

[Fifteen12]

Without seeing your code it's impossible to answer your question, but try outputing all your variables to the terminal, it's easy to have a mistake. To make it easier, try debugging your script by placing a breakpoint early in your code and stepping through it. You can check each variable as you go, it's probably an honest mistake.

Answer 2

[Star Strider]

You have a variable named ‘angle’ somewhere in your workspace. If you run:

which angle -all

/MATLAB/toolbox/matlab/elfun/angle.m
/MATLAB/toolbox/ident/ident/@iddata/angle.m               % iddata method
/MATLAB/toolbox/nnet/deep/@dlarray/angle.m                % dlarray method
/MATLAB/toolbox/parallel/gpu/@gpuArray/angle.m            % gpuArray method
/MATLAB/toolbox/parallel/parallel/@codistributed/angle.m  % codistributed method
/MATLAB/toolbox/symbolic/symbolic/@sym/angle.m            % sym method

the results should be similar to these.

If you have a variable called ‘angle’

angle = pi;

which angle -all

angle is a variable.
/MATLAB/toolbox/ident/ident/@iddata/angle.m               % Shadowed iddata method
/MATLAB/toolbox/nnet/deep/@dlarray/angle.m                % Shadowed dlarray method
/MATLAB/toolbox/parallel/gpu/@gpuArray/angle.m            % Shadowed gpuArray method
/MATLAB/toolbox/parallel/parallel/@codistributed/angle.m  % Shadowed codistributed method
/MATLAB/toolbox/symbolic/symbolic/@sym/angle.m            % Shadowed sym method
/MATLAB/toolbox/matlab/elfun/angle.m                      % Shadowed

the results should demonstrate that as well.

The solution is to rename the variable to something that does not overshadow any MATLAB function.

.