How do I overwrite a structure using a switch statement.

Hello,

I have the following function:

function [A,N] = area(f,a,b,varargin)

%Structure definition

s = struct('fh',f,...

'a',a,...

'b',b,...

'N',64,...

'Tolerance',10^(-6),...

'Algorithm','MiddleSum');

... rest of the code

The structure contains the defaults values that will be used to run the function if the user doesn't provide values for 'N',Tolerance and Algorithm.

I need to use a SWITCH statement to overwrite the structure values if the user does provide any or all of the values, and it must be case insensitive.

So if the user enters area(X^2,0,2,'N',2,'AlGoRithm','TrapeZoid') the structure should replace the default values N=64, algorithm = MiddleSum, with N=2 and Algorithm = Trapezoid.

Can someone please help me?

Answer 1

[Rik]

You can copy the code I used in my FEX submissions (see WBM, readfile, BlandAltmanPlot or RegGrow).

If you simply want to overwrite the default values you don't need a switch, you can simply use a loop.

[Sylvina Barreto]

Hi Rik!

I wish I could just do that but my assignment specifically asks for a switch.

[Rik]

If you look at my functions you will see I also did that. The benefit is that you can implement a test as well (validating input). Did you look up the functions I mentioned? Do they solve your question? Or do you need further clarification?

[Sylvina Barreto]

Hi, yes I looked at them. I'm pretty new with Matlab so it's hard for me to understand what's going on there :/ Do you have a simpler code that could help me a little bit?

[Rik]

Do you have trouble finding which function you need to look at? Did you run any example with the debugger (so you can step through the code line by line)?