I am trying to find the maximum and minimum values from a given set of data.

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Prateek Srivastava
Prateek Srivastava 2017-10-7
评论： Image Analyst 2017-12-21
when I am using findpeaks command in Matlab I am only getting the peak value I also want the minimum value could you suggest which command I can use.I am also attaching the data file which includes one column of time and one column of stress signals.I have also attach the Matlab file,please find the attachment

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Pedro Galvez
Pedro Galvez 2017-10-7
Hello!
Maybe you can first import the data into a vector and then look for the maximum and minimum like this:
A=importdata('sl.txt');
B=A.data;
mx=max(B(:,2))
mn=min(B(:,2))
This code should work!
Pedro

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Image Analyst
Image Analyst 2017-10-7
To find the "valleys", simply invert the signal
[peakHeights, indexesOfPeaks] = findpeaks(stress);
[valleyHeights, indexesOfValleys] = findpeaks(-stress); % Note the minus sign!
valleyHeights = abs(valleyHeights); % Correct for inverting it.
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Prateek Srivastava
Prateek Srivastava 2017-12-21
yeah I got your point that load is a function that takes file name string so what can I use to copy the ith element of the array "load" to the variable s1?
Image Analyst
Image Analyst 2017-12-21
Again, don't call it load. Call it thisLoad or something. Then to copy the ith element of that to s1, do this
s1 = thisLoad(i);

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