rpart problem (PR#313)
david_m_potter@groton.pfizer.com
david_m_potter@groton.pfizer.com
Fri, 5 Nov 1999 19:10:24 +0100 (MET)
* * * Just the Facts * * *
call to rpart() with a factor response gives
the error message:
"Error: first argument is array, but not matrix."
* * * Example Code * * *
==============================================
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Version 0.65.1 Release (October 07, 1999)
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> library(rpart)
> x _ 1:50
> y _ as.factor(rbinom(50,1,.5))
> fit _ rpart(y~x,method="class")
Error: first argument is array, but not matrix.
>
* * * Version Information * * *
==============================================
--please do not edit the information below--
Version:
platform = sparc-sun-solaris2.6
arch = sparc
os = solaris2.6
system = sparc, solaris2.6
status = Release
major = 0
minor = 65.1
year = 1999
month = October
day = 07
language = R
Search Path:
.GlobalEnv, package:rpart, Autoloads, package:base
* * * Unsolicited Hypothesis * * *
In rpart(), I believe this line causes the error message:
temp <- rp$dnode[, -(1:3)] %*% diag(init$parms[1:numclass] *
nobs/init$counts)
Thanks for your attention.
David
David M. Potter
Mathematical & Statistical Sciences
Pfizer Central Research
PO Box 8003/832
Groton, CT 06340-8003
Tel 860-715-1769 ; Fax 860-715-5445
potterdm@groton.pfizer.com
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