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Full Discussion: awk to median
Top Forums Shell Programming and Scripting awk to median Post 302280563 by otheus on Tuesday 27th of January 2009 08:59:43 AM
Old 01-27-2009
By "median", do you mean this?

By "every 128 values", do you mean every 128 lines? And do you want the median for each set of 128 lines, as opposed to the running median?

Assuming yes... and you have gawk
Code:
gawk -v max=128 '
        function median(c,v,  j) { 
           asort(v,j); 
           if (c % 2) return j[(c+1)/2]; 
           else return (j[c/2+1]+j[c/2])/2.0; 
        } 
{ 
         count++;values[count]=$NF;  
         if (count >= max) { 
           print  median(count,values); count=0; 
         } 
} 
END { 
         print  median(count,values); 
}'

 

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PGASetRealInitPercent(2)					      PGAPack						  PGASetRealInitPercent(2)

NAME
PGASetRealInitPercent - sets the upper and lower bounds for randomly initializing real-valued genes. DESCRIPTION
For each gene these bounds define an interval from which the initial allele value is selected uniformly randomly. With this routine the user specifies a median value and a percent offset for each allele. INPUT PARAMETERS
ctx - context variable median - an array containing the mean value of the interval percent - an array containing the percent offset to add and subtract to the median to define the interval OUTPUT PARAMETERS
none SYNOPSIS
#include "pgapack.h" void PGASetRealInitPercent(ctx, median, percent) PGAContext *ctx double *median double *percent LOCATION
real.c EXAMPLE
Set the initialization routines to select a value for each real-valued gene i uniformly randomly from the interval [i-v,i+v], where $v = i/2$. Assumes all strings are the same length. PGAContext *ctx; double *median, *percent; int i, stringlen; : stringlen = PGAGetStringLength(ctx); median = (double *) malloc(stringlen*sizeof(double)); percent = (double *) malloc(stringlen*sizeof(double)); for(i=0;i<stringlen;i++) { median[i] = (double) i; percent[i] = 0.5; } PGASetRealInitPercent(ctx, median, percent); 05/01/95 PGASetRealInitPercent(2)
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