How to find the average for the roundness value?

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junnie vix
junnie vix 2017-11-18
评论： Image Analyst 2017-11-19
I have already found 40 values for roundness . Now I want find the average to categorize them into different categories. Any idea to do the average calculation?

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回答（1 个）

Image Analyst
Image Analyst 2017-11-18
How about mean()?
meanRoundness = mean(allRoundnesses);
where allRoundnesses is a 1-D array of all your 40 roundness values.
  2 个评论
junnie vix
junnie vix 2017-11-19
编辑：Image Analyst 2017-11-19
roundness = 4 * pi * area ./ (perimeter .^ 2)
output(i,:) = {roundness, fileName};
This is my sample of coding. How do I find the all roundnesses?I still can't get it
Image Analyst
Image Analyst 2017-11-19
It appears to be code inside a loop over i. So index roundness in the loop
roundness(i) = 4 * pi * area ./ (perimeter .^ 2)
then outside/after the loop, use mean() like I showed you in the code above.
meanRoundness = mean(roundness);

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