How can I impose restrictions on a function @

Dear all

I have a compicated function

logPDF=@(x) set_up(x, a,y);

under the restriction x+a<0.999.

How can I impose this restriction on the above function? Do I need to set up another function? Can I impose the restrctions inside the set_up function?

[ektor]

any help?

[Mohammad Sami]

If the set_up function has this restriction, you need to edit the set_up function.

[ektor]

OK. So inside the set_up function I construct another function?

[James Tursa]

Just a simple if-test up front to throw an error if the desired condition is not met.

[Mohammad Sami]

You can use assert function to check the condition is met, otherwise it will throw an error.

assert((x+a)<0.999,'Error message you want to display / throw');