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Calculating the sum and average for a list of values

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Posted on: 11 Apr 2008
Author: mandrei
Section: Server Operating Systems | Administration Guides
Views: 480
Comments: 0 (Add)

Calculating the sum and average for a list of values
calculating the sum of values, calculating the average of values, sum and average

 



Many UNIX tools return the memory consumtion for each process in kilobytes, pages and so on.

Composing a bit more complicated command using tools like awk, and grep can give you a column with numbers => meaning the number of kilobytes/pages for each process. In case you need to calculate the sum of all these numbers, here's how to do it:

 

Calculating the sum and average for a list of values 

# cat sum_columns
49189
56616
58320
60509
65334
68978
71523
71557
78432
79619
80101
80607
87924
99126
141195
157816
164053
167987
169084
170685
171872
178360
320854
# awk '{ s += $1 } END { print "Sum: ", s,", Avg: ", s/NR, ", No.: ", NR }' sum_columns
Sum:  2649741 , Avg:  115206 , No.:  23

where Sum is the sum of all the values on first column ($1), Avg is the average of these values and No is the number of values.

 

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