global variable not working.

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Sameer
Sameer 2014-5-19
评论： Geoff Hayes 2014-5-19
function [f] = objfun(n)
global f;
f = var(n);
end
How is the global variable not working
  1 个评论
Geoff Hayes
Geoff Hayes 2014-5-19
Hi Sameer,
Please clarify the statement how is the global variable not working. What do you mean exactly?
Note that you are returning a parameter named f and you have declared a global variable with the same name. Why? There is no need to declare your return parameter as global.
Geoff

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Image Analyst
Image Analyst 2014-5-19
You don't need to make f global if you're returning it to the caller. Why? Why do that? Declaring it global inside objfun means that f now takes on whatever value it had last instead of being a local variable. But then you just overwrite that value , so there was absolutely no point in making it global since you didn't even use its global value. Delete that global line of code.

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