R help - Sep 2003 - convert a Character-string to a number

Hi Everyone.

I have a simple problem but don't know, how to get along.

how can I convert the vector

a<-c("0,01","1,00")
in a vector 
b<-c(0.01,1.00)

Thank you for suggestions

M.Kirschbaum



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On Friday 12 September 2003 14:29, Michael Kirschbaum wrote:
> Hi Everyone.
>
> I have a simple problem but don't know, how to get along.
>
> how can I convert the vector
>
> a<-c("0,01","1,00")
> in a vector
> b<-c(0.01,1.00)
You can use as.numeric(), but you need to change the decimal delimiter 
to ".", e.g.

R> as.numeric(gsub(",", ".", a))
[1] 0.01 1.00

hth,
Z
> Thank you for suggestions
>
> M.Kirschbaum
>
>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help

"Michael Kirschbaum" <emkiba at gmx.de> writes:
> Hi Everyone.
> 
> I have a simple problem but don't know, how to get along.
> 
> how can I convert the vector
> 
> a<-c("0,01","1,00")
> in a vector 
> b<-c(0.01,1.00)
> 
> Thank you for suggestions
[Expect about 10 people to chime in...]

as.numeric(sub(",", ".", a))

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   O__  ---- Peter Dalgaard             Blegdamsvej 3  
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~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

Michael Kirschbaum schrieb:
> Hi Everyone.
> 
> I have a simple problem but don't know, how to get along.
> 
> how can I convert the vector
> 
> a<-c("0,01","1,00")
> in a vector 
> b<-c(0.01,1.00)
> 
> Thank you for suggestions
Ah, it seems to be a common German problem. My solution is:

as.numeric(sub(",",".",a))

Thomas

as.numeric(gsub(",", ".", a))

works if the locale is such that decimal points are used instead of
commas, but you might seek a more generic solution and have
R use a comma for decimal separation - see ?localeconv.
> -----Original Message-----
> From: Michael Kirschbaum [mailto:emkiba at gmx.de]
> Sent: 12 September 2003 13:29
> To: R-Help
> Subject: [R] convert a Character-string to a number
> 
> 
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> ________________________________________________________________
> 
> Hi Everyone.
> 
> I have a simple problem but don't know, how to get along.
> 
> how can I convert the vector
> 
> a<-c("0,01","1,00")
> in a vector 
> b<-c(0.01,1.00)
> 
> Thank you for suggestions
> 
> M.Kirschbaum
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>
 

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?as.numeric

On Fri, 12 Sep 2003, Michael Kirschbaum wrote:
> Hi Everyone.
> 
> I have a simple problem but don't know, how to get along.
> 
> how can I convert the vector
> 
> a<-c("0,01","1,00")
> in a vector 
> b<-c(0.01,1.00)
> 
> Thank you for suggestions
> 
> M.Kirschbaum
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> 
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Box 118525                                   (ph)  352-392-5697
Gainesville, FL 32611-8525                   (fax) 352-392-3704

Michael Kirschbaum wrote:
> how can I convert the vector
> 
> a<-c("0,01","1,00")
> in a vector 
> b<-c(0.01,1.00)
What is your decimal delimiter ? '.' or ',' ?
If it is ',' you should change it into '.' and then as.numeric()
works
just fine.
If it is '.' it won't work.

HTH,
Laurent

Try

as.numeric(gsub(",",".",a))


Hope it helps!!


Best regards

Kenneth

On Fri, 12 Sep 2003 14:29:13 +0200, Michael Kirschbaum <emkiba at gmx.de> 
wrote:
> Hi Everyone.
>
> I have a simple problem but don't know, how to get along.
>
> how can I convert the vector
>
> a<-c("0,01","1,00")
> in a vector b<-c(0.01,1.00)
>
> Thank you for suggestions
>
> M.Kirschbaum
>
>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>


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