Hello,
I am a (relatively) experienced programmer, but new to R.
I have a problem using R 1.9.1. I have fit some data using glm(), from
within a function:
formula = as.formula(paste(depvarname, "~", rhs), env=globalenv())
return (glm(formula, family=binomial(link=logit)))
I have now come back to the formula and want to add some more
variables to it. So I do:
expand.model.frame(formulaname, ~ new_variable)
but I get the response
Error in eval(expr, envir, enclos) : Object "foreignaid.dummy" not found
where foreignaid.dummy is my dependent variable. However,
foreignaid.dummy is clearly visible in the global environment:
> ls(pat="foreignaid.dummy", envir=globalenv())
[1] "foreignaid.dummy"
...
So why is my dependent variable lost?
I have read the earlier comments on the same topic, but they seem to
indicate that a previous bug was fixed. Am I missing the point about
scoping?
Any help much appreciated.
David Hugh-Jones
Essex University Govt Dept
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