R help - Jun 2002 - plot(..., type="h") w/ origin not at y=0

Is it a way to make plots with vertical lines, like plot(x, y,
type="h"),
but starting from a different value than y=0.

For example, with x=1:3, y=-(1:3), y.orig=-3 :

  -1  |    
      |
y -2  |  |
      |  |
  -3  |  |  |  
      1  2  3 
         x
      
Thanks
-- 
Cyril Humbert 
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Cyril Humbert <humbertc at univ-mlv.fr> writes:
> Is it a way to make plots with vertical lines, like plot(x, y,
type="h"),
> but starting from a different value than y=0.
> 
> For example, with x=1:3, y=-(1:3), y.orig=-3 :
> 
>   -1  |    
>       |
> y -2  |  |
>       |  |
>   -3  |  |  |  
>       1  2  3 
>          x
>       
You might subtract y.orig from the data and add it to the axis labels....

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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Peter Dalgaard BSA wrote:
> 
> Cyril Humbert <humbertc at univ-mlv.fr> writes:
> 
> > Is it a way to make plots with vertical lines, like plot(x, y,
type="h"),
> > but starting from a different value than y=0.
> >
> > For example, with x=1:3, y=-(1:3), y.orig=-3 :
> >
> >   -1  |
> >       |
> > y -2  |  |
> >       |  |
> >   -3  |  |  |
> >       1  2  3
> >          x
> >
> 
> You might subtract y.orig from the data and add it to the axis labels....
Or see ?segments:
 plot(x, y, type="n")
 segments(x, y, x, y.orig)

Uwe Ligges
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Dear Cyril,

You might try something like the following:

    vlines <- function(x, y, y.orig){
        plot(range(x), range(c(y, y.orig)), type='n',
            xlab=deparse(substitute(x)), ylab=deparse(substitute(y)))
        for (i in seq(along=x))lines(x[c(i,i)], c(y.orig, y[i]))
        }

    vlines(1:3, y=-(1:3), y.orig=-3)

Note that the third line in your example has zero length.

I hope that this helps,
 John

On Thu, 27 Jun 2002, Cyril Humbert wrote:
> Is it a way to make plots with vertical lines, like plot(x, y,
type="h"),
> but starting from a different value than y=0.
>
> For example, with x=1:3, y=-(1:3), y.orig=-3 :
>
>   -1  |
>       |
> y -2  |  |
>       |  |
>   -3  |  |  |
>       1  2  3
>          x
>
> Thanks
> --
> Cyril Humbert
>
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> r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
> Send "info", "help", or "[un]subscribe"
> (in the "body", not the subject !)  To: r-help-request at
stat.math.ethz.ch
>
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
>
>
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