How to change the ylim in plot.stepfun function

Thu, Oct 31, 2002 7:34 PM #

dear R-Guru,

Anybody knows how to change the range of Y axis in plot.stepfun.
I want to overlap several stepping data with different y ranges.  But can't make it
becaues there is no option for ylim.

Thanks in advance.

Shawn Lee
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1 day later

Uwe Ligges

Sat, Nov 2, 2002 8:32 AM #

Shawn Lee wrote:

Right. But it's easy to add that option. Just change the following lines
in the function definition:


plot.stepfun <-
-   function(x, xval, xlim, xlab = "x", ylab = "f(x)", main = NULL,
+   function(x, xval, xlim, ylim, xlab = "x", ylab = "f(x)", main =
NULL,
             add = FALSE, verticals = TRUE, do.points = TRUE,

...

    else {
+   if(missing(ylim)) ylim <- range(c(y,Fn.kn))
-   plot(0,0, type="n", xlim=xlim, ylim=range(c(y,Fn.kn)),
+   plot(0,0, type="n", xlim=xlim, ylim=ylim,
         xlab=xlab, ylab=ylab, main= main, ...)
    segments(ti.l, y, ti.r, y, col=col.hor, lty=lty, lwd=lwd)
    }


Uwe Ligges
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