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Top Forums Shell Programming and Scripting Calculating average from files Post 302960712 by avina on Thursday 19th of November 2015 12:57:51 AM
Old 11-19-2015
Calculating average from files

I have some files with the following contents.I would like to calculate average of fifth column. How can I do this with awk?

Code:
file1

cat 95.9    152 78.0    17.9
rat 67.1    153 36.5    30.6
dog 81.4    154 68.1    13.3
dog 92.0    155 55.5    36.5
rat 73.8    156 23.9    49.9
file2

rat    79.0     157  64.3   14.7
fish   67.7     158  4.9    62.8
goat   90.2     159 80.7    9.5
dog    130.8    160 25.1    105.7

desired output

cat    17.9
rat    31.73
dog    51.83
fish   62.8
goat   9.5

I used the following code to calculate average. But the output is wrong.
Code:
awk '{a[$1]+=$5}END {for (i in a) {print i,a[i];Total+=a[i]}; print "average - ", Total/NR}' *

Code:
rat 95.2
goat 9.5
fish 62.8
cat 17.9
dog 155.5
average -  37.8778

This User Gave Thanks to avina 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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