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A Question on a Simple Loop

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Zahra kamkar
Zahra kamkar 2014-5-13
评论： Zahra kamkar 2014-5-14
Hello. My problem: We have 5 machines. We wanna play each of these machines 1000 times (we call each 1000 plays a TASK). In each time, the machine gives us a reward (randomly). We wanna check that the mean reward of which one of these TASKs is more than others (maximum). I wrote this code but it doesn't work well. Why?
for j=1:5
h=0;
for i=1:1000
rew=randn(1);
sum=rew+h;
end
mean(j)=sum./1000; [value,index]=max(mean(j))
end end
Thanks in advance
  2 个评论
Walter Roberson
Walter Roberson 2014-5-13
Do not use "sum" as the name of a variable or you will almost always encounter problems with sum() being the name of a useful MATLAB function.

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回答（1 个）

Walter Roberson
Walter Roberson 2014-5-13
You never update "h" so at each point "sum" will be assigned only the latest random value.

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