[R] determine the number of digits printed into graph with"text(...)"

[Peter Alspach]

Georg

?format

(or simply ?round if you are happy to drop the occasional final 0)

HTH .......

Peter Alspach
 

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Georg Ehret
> Sent: Monday, 26 November 2007 4:00 p.m.
> To: r-help
> Subject: [R] determine the number of digits printed into 
> graph with"text(...)"
> 
> Dear R comunity,
>    I am printing a number in a graph using "text(...)" -  see code
> below: "fraction" is my number. I wish to print only two 
> digits of the number and struggle to do this... 
> options(digit=3) does not work...
> Thank you for your suggestions! Cheers, Georg.
> 
> **********************************
> Georg Ehret
> Johns Hopkins
> Baltimore
> 
> callrates<-read.table("RSG",col.names=c("variant","callrate"))
> hist(callrates[,2],breaks=100)
> fraction<-nrow(callrates[callrates$callrate>=0.9,])/nrow(callrates)
> hist(callrates[,2],breaks=100)
> text(0.4,500,"proportion of callrates >= 0.9:")
> text(0.4,450,fraction)
> 
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> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 

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