Re: [R] How to replace 'star (*)' with blank space?

From: David Winsemius <dwinsemius_at_comcast.net>
Date: Wed, 20 Apr 2011 07:11:10 -0400

On Apr 20, 2011, at 6:00 AM, Ruby Chu wrote:

> Hi There
>
> I'm not very sure how to replace the stars in a character vector
>
> For example:
>
> a character vector (n rows by 1 col)
>
> [1] "-27 -21 -25 -28**** ***** -29"
> [2] "-27 ******** -28**** ***** -29"
> .
> .
> .
> .
> .
> .
> [n] "-1***********************************"
>
> I wish to replace all the *s with a blank, result as per below
>
> [1] "-27 -21 -25 -28 -29"
> [2] "-27 -28 -29"
> .
> .
> .
> .
> .
> .
> [n] "-1 "
>
> I have tried to use gsub( )
> like: gsub("*", "", x)

"*" is an operator in regex, so you need to double escape it in the pattern argument (but may not need to escape it in the replace argument.

 > gsub("\\*", "", "test8888****8888****9999") [1] "test888888889999"

 > gsub("\\.", "*", "test8888...8888...9999") [1] "test8888***8888***9999"

> but doesn't seem to be working...please advise
>
> Thank you
>
> Ruby
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.

David Winsemius, MD
West Hartford, CT



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