how to use the 'user defined' type in the window designer app?

I am trying to use window designer app, and I am unable to use the 'user defined' type in the 'Type' tab of the 'current window information' panel. I selected 'user defined' type and written sqrt(length^2-n.^2) and it is giving error 'not enough input arguments. I tried defining n==[-(length-1)/2:(lebgth-1)/2]; sqrt(length^2-n.^2); it is giving invalid expression.

I don;t know how to resolve this.

Answer 1

[Cris LaPierre]

The error you are seeing is specifically in relation to length. It is trying to use the length function, but it needs an input.

% with an input
length(1:10)

ans = 10

% without
length^2

Error using length
Not enough input arguments.

I suspect you are trying to refer to the next field in the app, where Length is 64. I suggest just hardcoding the 64. This approach assumes n exists as a variable in the workspace.

sqrt(64^2-n.^2)

[Palguna Gopireddy]

I tried putting sqrt(64^2-n.^2)

It is giving error:Unrecognized function or variable 'n'

How to solve now?

[Cris LaPierre]

You need to define the variable n. Any variables you use in your expression must exist in your workspace or you will get this error.

In your command window, type n=1 and then press enter. Now that the variable exists, click Apply in the app.

[Palguna Gopireddy]

Thanks. It is solved.