Function is not working

Can somebody please tell me why this is not working? I'm a beginner with Matlab

relor = gdif(target==2); 
if relor > 90
    coror = relor - 180;
elseif relor < -90
    coror = relor + 180;
else
    coror = relor;
end

[Walter Roberson]

What error are you getting?

I note that you do not have a function header as would be required for a function.

[MadjeKoe]

I do not get an error, but the values aren't added or substracted by 180

[Image Analyst]

Then your coror must be in the range -90 to +90, inclusive. What is gdif and target? What values do they have???

[Walter Roberson]

I suspect that target == 2 is true for more than one location, so that relor is a vector instead of a scalar. If so then you need to use logical indexing.

Answer 1

[Asad (Mehrzad) Khoddam]

coror = relor + (relor - 180).*(relor > 90) + (relor + 180) .* (relor < -90);

[MadjeKoe]

I tried this, but there are still values left outside -90 & 90. How is this possible?

[Asad (Mehrzad) Khoddam]

Yes, we have some missing:

coror = relor.*(relor>=-90 & relor<=90) + (relor - 180).*(relor>90) + (relor + 180).*(relor<-90);

Answer 2

[Walter Roberson]

relor = gdif(target==2);
coror = relor;
mask = relor > 90;
coror(mask) = relor(mask) - 180;
mask = relor < -90;
coror(mask) = relor(mask) + 180;