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

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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.

Accepted Answer

Cris LaPierre
Cris LaPierre on 24 Feb 2022
Edited: Cris LaPierre on 24 Feb 2022
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)
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