How to find the difference of the maximum points between datasets

Hi,

I have three data sets of sine waves, I am looking of the way to find the maximum points (only) for each dataset and then find the difference between them

Answer 1

[Image Analyst]

Try

[max1, index1] = max(signal1);
[max2, index2] = max(signal2);
[max3, index3] = max(signal3);
% Difference between maximum amplitudes.
diff12 = abs(max1 - max2); 
diff13 = abs(max1 - max3);
diff23 = abs(max2 - max3);
% Now diff between indexes
indexDiff12 = abs(index1 - index2);
indexDiff13 = abs(index1 - index3);
indexDiff23 = abs(index2 - index3);

[Ahmed Abdalazeez]

[Ahmed Abdalazeez]

what I want to do, is to find not only one msximum but the max for each peak for all dataset, I used findpeak, but it gives me several points, but indeed I need only the maximum point for each peak,,

thanks in advance

[Image Analyst]

Try passing each signal into findpeaks().

Answer 2

[Kevin Phung]

if y1 is vector consisting of the y-values for your sinewave,

max(y1) 

will return the max value. min(y1) will give you its minimum.