How to specify multiple regular expressions for pattern argument

I'm curious about the 'real' answer myself but this would work:

ls(pattern='^d')[ls(pattern='^d') %in% ls(pattern='[[:digit:]]$')]

Cheers,Tyler Rinker

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Date: Fri, 11 May 2012 13:18:59 -0500
From: jun.shen.ut at gmail.com
To: r-help at stat.math.ethz.ch
Subject: [R] How to specify multiple regular expressions for pattern argument

Dear list,

I want to show all the objects starting with "d" and ending with a digit.
How do I specify these conditions in the pattern argument

I can do one condition but not two

ls(pattern='^d')
ls(pattern='[[:digit:]]$')

are working.

But,

ls(pattern='^d'&'[[:digit:]]$') is not working.

Appreciate any comment.

Jun Shen

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How to specify multiple regular expressions for pattern argument

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