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Top Forums Shell Programming and Scripting Computing average and standard deviation from multiple text files Post 302686731 by bartus11 on Wednesday 15th of August 2012 10:43:35 AM
Old 08-15-2012
Put this in "script.awk":
Code:
{ if (FNR==1) file++
  for (i=1;i<=NF;i++) {
    sum[FNR" "i]+=$i
    count[FNR" "i]++
    data[file" "FNR" "i]=$i
  }
}END{
  for (i=1;i<=FNR;i++) {
    for (j=1;j<=NF;j++) {
      avg[i" "j]=sum[i" "j]/count[i" "j]
    }
  }
  for (f=1;f<=file;f++) {
    for (i=1;i<=FNR;i++) {
      for (j=1;j<=NF;j++) {
        tmp[i" "j]+=(data[f" "i" "j]-avg[i" "j])*(data[f" "i" "j]-avg[i" "j]);
      }
    }
  }
  for (i=1;i<=FNR;i++) {
    for (j=1;j<=NF;j++) {
      printf avg[i" "j]" "
    }
    for (j=1;j<=NF;j++) {
      printf sqrt(tmp[i" "j]/count[i" "j])" "
    }
    printf "\n"
  }
}

Then run:
Code:
awk -f script.awk input1.txt input2.txt input3.txt

Check if the resulting numbers are correct using Excel or something like that. I didn't have time to do that.
This User Gave Thanks to bartus11 For This Post:
 

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GRI_MERGE(1)						      General Commands Manual						      GRI_MERGE(1)

NAME
gri_merge - merge multiple Gri output files into a single PostScript file. USAGE (style 1): gri_merge [OPTIONS] CxR a.ps b.ps ... > merged_file.ps Merges the files onto one page, in 'C' columns and 'R' rows. The CxR files are given in the order of words on a page. The page is pre- sumed to be 8.5x11in in size, as are all the input files, and the input files are sized to fit, and kept in natural scale. USAGE (style 2): gri_merge [OPTIONS] xcm ycm enlarge a.ps [b.ps ...] > merged_file.ps Where `enlarge' is a scale factor applied after offsetting `xcm' to the right and `ycm' upward. EXAMPLE (style 2): The following gri_merge 2 12 .5 a.ps 12 12 .5 b.ps 2 2 .5 c.ps 12 2 .5 d.ps > all.ps produces 4 panels from gri plots done using margins and sizes as specified in the following lines in a gri commandfile set x margin 2 set x size 15 set y margin 2 set y size 15 The OPTIONS, available if your 'perl' has 'getopts' library, are: -u graylevel -- set graylevel for underlay beneath panels, by default 0.75. Values range from 0 (black) to 1 (white), although a value of precisely 1 means do NOT draw underlay. -b graylevel -- Set value for background under individual panels, again 0 for black to 1 for white, with 1 meaning no drawing. -h -- Print this help message and quit. SEE ALSO
gri(1), gri_unpage(1) gri_merge 2009 GRI_MERGE(1)
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