scoping problem?
yudi at hermes.ucd.ie writes:
Dear R-helpers: (this is part of a bigger program)
the following fails as a function, but runs OK
if we comment out the fnfn_ function() line.
Any hint would be appreciated. -Yudi-
R : Copyright 1998, The R Development Core Team
Version 0.63.0 Beta (Nov 13, 1998) -- on WIndows3.11
fnfn _ function (m=10,n=10,spar=2)
{
fn _ function(u,v){
uc_ u-floor(m/2)-1
vc_ v-floor(n/2)-1
exp(-(uc^2 + vc^2)/2/spar^2)
}
x1_ 1:m ; x2_ 1:n
x12 _ outer(x1,x2,FUN='fn')
filt _ x12/sum(x12)
image(filt)
}
source('fnfn.r')
m_10; n_10; spar_2
fnfn(m,n,spar)
You want to get rid of the quotes around fn in the outer() call. If you pass a text string rather than the actual function, outer() will go looking for a function of that name in its own lexical scope and fail.
O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._