mxArray to double?

I am using simevents and using importdata to bring variable from .mat file to simevents. I want to use this variable in if statement and possibly change the value as well. However, I am getting this error:

Expected either a logical, char, int, fi, single, or double. Found an mxArray. MxArrays are returned from calls to the MATLAB interpreter and are not supported inside expressions. They may only be used on the right-hand side of assignments and as arguments to extrinsic functions.

Is there a way to fix this? mxArray to double? I have an example below

choice.mat has one variable.

I have tried declaring the variable count as doule and called importdata, but I'm still getting the same error.

[James Tursa]

Please show us the relavant code.

[Ho Jung Kim]

I added an example. Thank you.

Answer 1

[Abderrahim. B]

Hi!

I' m not sure how did define variable count as double!

Try to preinitialize the variable count before calling the function.

count = zeros(size(count))

If you don't know the size of your variable then use zeros .

Hope this helps

[Ho Jung Kim]

Thank you so much! This works!!!

[Abderrahim. B]

Glad it worked.

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