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boundry
2009 Mar 18
2
Profiling question: string formatting extremely slow
Hi all,
I'm using R to find duplicates in a set of 6 files containing Part Number
information. Before applying the intersect method to identify the duplicates
I need to normalize the P/Ns. Converting the P/N to uppercase if
alphanumerical and applying an 18 char long zero padding if numerical.
When I apply the pn_formatting function (see code below) to "Part Number"
column of the
2007 Apr 20
2
sorting data in R
....9 7 3 98.22 20.2
St Maurice 65.0 75.9 9 9 99.06 17.8
Sierre 92.2 84.6 3 3 99.46 16.3
Sion 79.3 63.1 13 13 96.83 18.1
Boudry 70.4 38.4 26 12 5.62 20.3
La Chauxdfnd 65.7 7.7 29 11 13.79 20.5
Le Locle 72.7 16.7 22 13 11.22 18.9
Neuchatel 64.4 17.6 35 32...