Re: [R] try catch block

From: Martin Morgan <mtmorgan_at_fhcrc.org>
Date: Tue, 17 Jun 2008 15:21:08 -0700

ppatel3026 <pratik.patel_at_us.rothschild.com> writes:

> How can I use the try catch block such that if this statement fails
> xml <- xmlTreeParse(xmlTxt, useInternal=TRUE)
>
> then this statement is executed
>
> xml <- xmlMalFormed()

library(XML)
xml <-

    tryCatch({

        # other code, then...
        xmlTreeParse("sdf", useInternal=TRUE)
    }, error=function(err) {
        cat("err:", conditionMessage(err), "\n")
        ## etc
        "oops"

})
xml # "oops"

> ?

?tryCatch has examples.

> This code does not work but assuming its somewhere along these lines:
> tryCatch(xml <- xmlTreeParse(xmlTxt, useInternal=TRUE), xml <-
> xmlMalFormed(f1))

Martin

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-- 
Martin Morgan
Computational Biology / Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N.
PO Box 19024 Seattle, WA 98109

Location: Arnold Building M2 B169
Phone: (206) 667-2793

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Received on Tue 17 Jun 2008 - 22:57:19 GMT

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