I want to find indexes for maximum and minimum

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Young Lee
Young Lee 2018-10-20
评论： madhan ravi 2018-10-21
I am new to matlab and having difficulty. I want to find indexes for maximum and minimum and put them into sets of array. Here is what I have tried. I have no clue on how to produce data for minimum X and Y indexes. Much appreciated for help!
Ry = HeelArray(:,3);
Ry2= HeelArray(:,6);
plot (Ry)
hold on
plot (Ry2)
findpeaks(Ry2, 'Minpeakheight',500);
[Minima, MinIdx] = findpeaks(Ry2, 'Minpeakheight',500);
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Image Analyst
Image Analyst 2018-10-20
Can you attach HeelArray in a .mat file with the paper clip icon, and attach a PNG screenshot with the green and brown frame icon.

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madhan ravi
madhan ravi 2018-10-20
编辑：madhan ravi 2018-10-20 
 findpeaks(-Ry2); %see carefully I added minus sign in front of Ry2
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