Fortran Find peak in the historgram data file - FORTRAN

AI Thread Summary
To find the peak in a dataset of X Y values using Fortran, the initial approach involves opening the data file and reading the values into arrays. The key steps include using the MINVAL function to identify the lowest Y value, which indicates the peak, and MINLOC to locate its position in the array. There is a suggestion to clarify the definition of "peak," with a consideration of whether derivatives are necessary for a more precise identification of local minima or maxima. This indicates that the discussion may involve further analysis techniques beyond simple value comparison.
gaijin1
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Hello guys,

I have a file with X Y values (separated by space)

I want to scan the data to find the PEAK in the file. (It will probably be a lowest Y point...)

How do I do this is Fortran?

Thank you,

Alexander
 
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Seems like...
Code: 
OPEN(11,file='inputfile.dat',form='formatted')
DO n=1,nPts
  READ(11,*) x,y
END DO
peak_val = MINVAL(y)
peak_loc = MINLOC(y)
Can you elaborate a little more on this "peak" that you need to find? Do you need to take derivatives?
 

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