[R] (Novice-) Problem with the plot-function

[Peter Dalgaard]

Atropin75 at t-online.de (Felix Eschenburg) writes:

> Hello,
> i have written this little function to draw different normal distributions:
> 
> n.Plot <- function(x,my,sigma) {
> e <- exp(1)
> names(x) <- x
> f.x <- (1/(sigma*sqrt(2*pi)))*e^(-1*(((x-my)^2)/2*(sigma^2)))
> plot(f.x,type="l",xlim=c(-5,5))
> return(f.x)
> }
> 
> if i define x like this:
> x <- seq(-5,5,0.01)
> 
> Now 
> n.Plot(x,0,1) 
> DOES draw the correct plot, but the x-axis is labeled from 0 - 1000.
> If i give the plot function the xlim=c(-5,5) option, the plot is only drawn 
> for the first 5 values of x.
> How do i tell plot not to take the indices of x, but the values (or their 
> range) of x for labeling the x-axis ?

Tell plot what your x coordinates are:

plot(x, f.x, type="l", xlim=c(-5,5))
     
-- 
   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