plot(SOM) segfaults (PR#7157)
On Tue, 10 Aug 2004 12:22:19 +0100 (BST)
Prof Brian Ripley <ripley@stats.ox.ac.uk> wrote:
It is reasonable to expect plot to work for any arbitrary function, or alternatively for any function to work with this sort of abuse?
I think the former, but I agree it is impossible to do the necessary checks. What probably remains is to add some check in SOM() to avoid the segfault. (Which, I guess, occurs in the call of "VR_onlineSOM" because n = as.integer(nrow(data)) becomes numeric(0) since nrow(data) is NULL in this case?) So, this bug report was indeed sent to the wrong place, my apologies... -d
If the latter, this is a bug report on class and was sent to the wrong place (see the FAQ). If the former, plot.function and curve do no checking, but what could they reasonably do? On Tue, 10 Aug 2004 david.meyer@wu-wien.ac.at wrote:
library(class) plot(SOM) segfaults in curve() at the line: y <- eval(expr, envir = list(x = x), enclos = parent.frame()) at least since R version 1.8.1. Version: platform = i686-pc-linux-gnu arch = i686 os = linux-gnu system = i686, linux-gnu status = Under development (unstable) major = 2 minor = 0.0 year = 2004 month = 07 day = 27 language = R Search Path: .GlobalEnv, package:class, package:methods, package:stats, package:graphics, package:utils, Autoloads, package:base
-- Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
Dr. David Meyer Department of Information Systems Vienna University of Economics and Business Administration Augasse 2-6, A-1090 Wien, Austria, Europe Fax: +43-1-313 36x746 Tel: +43-1-313 36x4393 HP: http://wi.wu-wien.ac.at/Wer_sind_wir/meyer/