R help - Sep 2007 - plot vs curve

Dear list members,

is it intentional that:


curve(cos, xlim = c(-5, 5))
plot(cos, xlim = c(-5, 5))


produce different plots?

Shouldn't the 'xlim' argument in both cases set the 'from'
and 'to' argument if they
aren't supplied (at least that's what I understood reading the help page
for 'curve' and
'plot.function')?


Christian




 > sessionInfo()
R version 2.5.1 (2007-06-27)
i386-pc-mingw32

locale:
LC_COLLATE=Danish_Denmark.1252;LC_CTYPE=Danish_Denmark.1252;LC_MONETARY=Danish_Denmark.1252;LC_NUMERIC=C;LC_TIME=Danish_Denmark.1252

attached base packages:
[1] "stats"     "graphics"  "grDevices"
"utils"     "datasets"  "methods"
[7] "base"

other attached packages:
       car       drc   plotrix      nlme      MASS   lattice
   "1.2-1"   "1.2-3"   "2.2-4"  "3.1-83"
"7.2-34" "0.15-11"

Christian Ritz wrote:
> Dear list members,
>
> is it intentional that:
>
>
> curve(cos, xlim = c(-5, 5))
> plot(cos, xlim = c(-5, 5))
>
>
> produce different plots?
>
> Shouldn't the 'xlim' argument in both cases set the
'from' and 'to' argument if they
> aren't supplied (at least that's what I understood reading the help
page for 'curve' and
> 'plot.function')?
>   
Yes, that's a bug in plot().  It sets the default for from and to before 
it checks whether xlim was supplied.  I'll fix it.

Duncan Murdoch
>
> Christian
>
>
>
>
>  > sessionInfo()
> R version 2.5.1 (2007-06-27)
> i386-pc-mingw32
>
> locale:
>
LC_COLLATE=Danish_Denmark.1252;LC_CTYPE=Danish_Denmark.1252;LC_MONETARY=Danish_Denmark.1252;LC_NUMERIC=C;LC_TIME=Danish_Denmark.1252
>
> attached base packages:
> [1] "stats"     "graphics"  "grDevices"
"utils"     "datasets"  "methods"
> [7] "base"
>
> other attached packages:
>        car       drc   plotrix      nlme      MASS   lattice
>    "1.2-1"   "1.2-3"   "2.2-4" 
"3.1-83"  "7.2-34" "0.15-11"
>
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