How to find the average for the roundness value?

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?

Answer 1

[Image Analyst]

How about mean()?

meanRoundness = mean(allRoundnesses);

where allRoundnesses is a 1-D array of all your 40 roundness values.

[junnie vix]

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]

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);