[R] simple coding question

Kirsten Beyer kirsten-beyer at uiowa.edu
Mon Jul 30 23:31:02 CEST 2007

I have a list of ICD9 (disease) codes with various formats - 3 digit,
4 digit, 5 digit.  The first three digits of these codes are what I am
most interested in.  I would like to either add zeros to the 3 and 4
digit codes to make them 5 digit codes or add decimal points to put
them all in the format ###.##.  I did not see a function that allows
me to do this in the formatting command.  This seems simple - can
someone help?


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