On Sep 10, 2010, at 4:05 PM, Nick Matzke wrote:
Hi,
Is there an easy way to convert numbers into a form such that they
all have the same number of digits?
e.g.:
"1", "10", and "100"
...become...
"0001", "0010", "0100" etc.
> sprintf("%05.0f", 100)
[1] "00100"
> sprintf("%04.0f", 100)
[1] "0100"
I ask because I am producing a large number of files that need to
sort consistently by filename. Currently I get this kind of sorting:
filename1
filename10
filename11
filename12
filename13
filename14
filename15
filename16
filename17
filename18
filename19
filename2
filename20
filename21
...etc..
which is annoying. Ideally I'd have:
filename0001
filename0002
filename0003
filename0004
filename0005
filename0006
filename0007
filename0008
filename0009
filename0010
filename0011
...etc..
Basically I want to produce strings like "0010" without an elaborate
hack.
Thanks!
Nick
--
====================================================
Nicholas J. Matzke
Ph.D. Candidate, Graduate Student Researcher
Huelsenbeck Lab
Center for Theoretical Evolutionary Genomics
4151 VLSB (Valley Life Sciences Building)
Department of Integrative Biology
University of California, Berkeley
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think that thinking the earth is spherical is just as wrong as
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