Re: [R] direction of axes of plot

[Henrik Andersson]

Assume I want to put this into a function, how do I redefine the margins 
to fit better.

I did par(mar=c(4.1,4.1,5.1,2.1) inside the function, but then it is not 
possible anymore to change them, I just want to change the default for 
this plotting function, how ?

#----------------------------------------------------------
#Function to be improved
#-----------------------------------------------------
plot.revy <- function(x,y,...)
  {
    plot(x,y,ylim=rev(range(y)),axes = FALSE,...)
    axis(2)
    axis(3)
    box()
  }
Ross Ihaka wrote:
XIAO LIU wrote:
R users:
I want X-Y plotting with axes in reverse direction such as (0, -1, -2, 
-3, ....).  How can I do it?

Thanks in advance

Use the xlim and ylim arguments to plot.
    x = -(1:10)
    y = rnorm(10)
    # Standard plot
    plot(x, y)
    # Reversed x-axis
    plot(x, y, xlim=rev(range(x)))
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