How to find average?

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Brian Liu
Brian Liu 2018-1-21
回答： Image Analyst 2018-1-21
Hi,
I'm a beginner to MATLAB. I'm simulating a coin toss and I'm trying to find the average across the 10 iterations.
for i = 1:10
heads = 0;
numflips = 0;
payoffs = 0;
sumpayoff = 0;
while heads == 0
numflips = numflips + 1;
if rand () > .5
payoff = 2^numflips;
heads = 1;
sumpayoff = sumpayoff + payoff;
else
heads = 0;
end
end
payoff
numflips
avgpayoff = sumpayoff/numflips
end
Could somebody explain why this doesn't work? The "sumpayoff" bit isn't tallying up the payoffs across the 10 iterations accurately.

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回答（1 个）

Image Analyst
Image Analyst 2018-1-21
Maybe say
avgpayoff(i) = sumpayoff/numflips % Get payoff for this iteration.
Then after the loop do
meanPayOff = mean(avgpayoff);

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