[R] how to override/replace a function in a package namespace?
Michael Friendly
friendly at yorku.ca
Sun Aug 17 18:42:38 CEST 2008
I'm trying to test an extension of mosaic() from the vcd package that
requires a change to the
basic strucplot() function from that package. I want to test my change
by sourcing the
replacement function into my R session.
But when I do that,
source("c:/R/mosaics/strucplot-MF.R")
and run my extension, it is apparent that it is vcd:::strucplot that is
eventually called, not
my replacement. Thus, I'm looking for something with the semantics and
effect of
source("c:/R/mosaics/strucplot-MF.R", namespace="vcd")
that would replace the package version with my testing one.
This question may have come up before, but searching the usual sources
hasn't turned up anything
useful.
-Michael
--
Michael Friendly Email: friendly AT yorku DOT ca
Professor, Psychology Dept.
York University Voice: 416 736-5115 x66249 Fax: 416 736-5814
4700 Keele Street http://www.math.yorku.ca/SCS/friendly.html
Toronto, ONT M3J 1P3 CANADA
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