R help - Feb 2009 - Extracting Variable Name to define breaks for histogram

Hi

I am trying to define an automatic breaks function for a histogram.
Inputs are a vector x and a number n. What I would like is to define the
outcome as breaks_(Name of Vector) - but the paste("breaks_",x)
obviously
refers to the whole vector. 

breaks<- function(x, n)
{
R<-range(x, na.rm=T)
diff_x<-R[2]-R[1]
paste("breaks_",x)<-c(NA, seq(floor(R[1]), ceiling(R[2]),diff_x/n))
rm(diff_x, R)
}
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Christian Langkamp wrote:
> Hi
> 
> I am trying to define an automatic breaks function for a histogram.
> Inputs are a vector x and a number n. What I would like is to define the
> outcome as breaks_(Name of Vector) - but the paste("breaks_",x)
obviously
> refers to the whole vector. 
> 
> breaks<- function(x, n)
> {
> R<-range(x, na.rm=T)
> diff_x<-R[2]-R[1]
> paste("breaks_",x)<-c(NA, seq(floor(R[1]),
ceiling(R[2]),diff_x/n))
> rm(diff_x, R)
> }
I do not think you want it that way. You want to return values, not to 
assign it into the environment of a function that is shortly deleted anyway.

Anyway, for the assignment itself (that is also undesirable), see ?assign

Uwe Ligges