if statements not executing as expected

I'm experiencing problems with if statements under certain conditions. I'm using code within a Simulink embedded Matlab function block that looks something like this:

function setting = setting_select(error)

if error == -0.1

 setting = 3;

else

 setting = 4;
end

This looks trivial but the setting = 3 statement never executed even if error does indeed equal -0.1. The error signal is computed in a separate embedded Matlab block. However, when I replace the error signal with a constant (-0.1) the statement executes correctly. There are no algebraic loops nor continuous states in the model. I've tried casting data types in case the conditional statement is comparing different number formats but that didn't work either.

Thanks for your help.

Answer 1

[Walter Roberson]

Please see the FAQ on this topic.

[Ibrahim]

That worked, thanks very much!