On Fri, 19 Mar 2004, Randy Zelick wrote:
I got three responses for help on the leading zero problem. Thank you.
Well, it seems that you didn't tell us what the actual problem was: please
consult the posting guide and its references and learn to ask the right
question.
Alas I still don't have it working. Here are more specifics:
I read in a data file like this:
participants-read.table(C:/Work/blah-blah)
The data file consists of the fields last name, first name, social
security number, response score 1, response score 2 and so forth.
If in the console window I type participants I get something like:
Jones Norman 786123344 98.2 16.3
FlintstoneFred 111457654 10.1 8.8
UglyButt 89733456 66.7 32.0
The problem is that the 3rd social security number is really 089733456
and it needs to look like that.
Did you read the help page for read.table or the `R Data Import/Export
Manual'? Set colClasses and avoid the conversion to numeric. You didn't
tell us you were reading a file with leading zeroes.
None of the methods suggested seemed to work. I could make the social
security object alone print with leading zeros, but not as part of the
data frame.
All the solutions I have seen do work, but mine is very simple. You need
to convert just that column (which is not what you said you wanted).
library(MASS)
hills$climb - gsub( , 0, format(hills$climb))
hills
You could also use
hills$climb - formatC(hills$climb, format=f, flag=0, digits=0, width=4)
(Martin didn't give all the details)
hills$climb - sprintf(%04.0f, as.double(hills$climb))
In every case, printing the data frame does show leading zeroes.
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UKFax: +44 1865 272595
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