Fortran Quantile subroutine, Fortran 90

AI Thread Summary
A user is seeking a Fortran 90 subroutine for calculating quantiles from a 1-D array, specifically looking for a method to obtain the median with a function call like "call quantile(array,0.5D0,value)". Another participant suggests using existing sorting routines to achieve this, recommending to sort the array, determine its size, and access the appropriate data point for the quantile. The original poster confirms they have implemented this solution successfully.
natski
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Hi all,

I have been Googling for a Fortran 90 quantile routine but to no avail...

I need a subroutine to which one passes an 1-D array plus the quantile range required...

e.g.

"call quantile(array,0.5D0,value)"

would give me the median of array. Does anyone know of a handy (and free) F90 script to accomplish this?

Thanks,

natski
 
Last edited:
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Just use one of the many sorting routines that are available. Then get the SIZE(array), divide that number of by 2, round and get the data point at that location.
 
Yup was just about to post that I'd done exactly that :-)
 

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