[R] how to use substring match as condition?

[john seers (IFR)]

Something like this may be close to what you want:

subset(input, field1=="blah1" & !is.na(charmatch("blah3",input$field3)))
 
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-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Albert Vilella
Sent: 29 May 2008 11:38
To: r-help at r-project.org
Subject: [R] how to use substring match as condition?

Hi,

How can I use a substring match as a condition in a subset command?

Sth like this:

subset(input, field1=="blah1" & field2=="blah2") # but now with
substring match in field2

subset(input, field1=="blah1" & field3 *substringmatch* "blah3")

I've tried with gsub, but it won't work:

subset(input, field1=="blah1" & gsub("blah3","",input$field3))

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