It doesn't say it allows ylim, either. Why would you want to do this? rpart is a port of code written for S-PLUS 6: that has been finalized last week and rpart version 3.1-3 is the result. It's been very difficult tracking the changes, and I am not prepared to diverge the R port from the original except where essential. (By no means all changes I feed back get incorporated.) You'll need to convince me that this is essential.
On Wed, 14 Nov 2001 gregory_r_warnes@groton.pfizer.com wrote:
Full_Name: Gregory R. Warnes Version: R 1.3.1 OS: Solaris 2.8 Submission from: (NULL) (192.77.198.200) rpart library version 3.1-2 Error message:
plotcp(fit.thirds.1,ylim=c(0.7,1.5));
Error in plot.default(ns, xerror, axes = FALSE, xlab = "cp", ylab = "X-val Relative Error", : formal argument "ylim" matched by multiple actual arguments
This can be corrected by adding ylim to the list of formal argument and
wrapping
the definition of ylim with 'if(missing(ylim))'. Patch below.
-Greg
---PATCH STARTS HERE---
diff -r rpart.orig//R/plotcp.s rpart/R/plotcp.s
5c5
< upper=c("size", "splits", "none"), ...)
---
upper=c("size", "splits", "none"), ylim, ...)
18c18,19 < ylim <- c(min(xerror - xstd) - 0.1, max(xerror + xstd) + 0.1) ---
if(missing(ylim))
ylim <- c(min(xerror - xstd) - 0.1, max(xerror + xstd) + 0.1)
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