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nawk-how count the number of occurances of a pattern, when don't know the pattern

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# 1  
Old 05-10-2008
nawk-how count the number of occurances of a pattern, when don't know the pattern
I've written a script to count the total size of SAN storage LUNs, and also display the LUN sizes.
From server to server, the LUNs sizes differ.
What I want to do is count the occurances as they occur and change.

These are the LUN sizes:
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
49.95
55.96
55.96
49.99
49.99
49.99
49.99
49.99
49.99
49.99
49.99
49.99

The above would produce something like this:
17x49.95, 2x55.96, 9x49.99

2nd example data file
27.96
27.96
27.96
27.96
27.96
27.96
27.96
13.95
2.95
2.95
142.99
142.99
142.99
142.99
142.99
142.99
142.99

produces
7x27.96, 1x13.95, 2x2.95, 7x142.99

I'm trying to find a way to do this with nawk.
# 2  
Old 05-10-2008
Code:
nawk '{a[$0]++}END{for (i in a) print  a[i] ,i}'


For a fancier output use:

Code:
nawk '{a[$0]++}END{for (i in a) printf "%-2d -> %.2f \n", a[i], i}' file

Output:

Code:
17 -> 49.95 
9  -> 49.99 
2  -> 55.96

# 3  
Old 05-11-2008
Thanks very much, that worked well. Very compact!
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