Hello,
I have a general function which I am used for calculations. I call this
function through different functions corresponding to different particular
cases of this method. The particular function create a list, and in this
list, I have a function which can modify other elements of the list for
updating purposes.
See the example below:
particular1=function()
{
obj=list()
obj$names=c("obj$c1","obj$c2")
obj$c1=8
obj$update=function(obj) {obj$c1=15; print(obj$c1)}
general(obj)
}
general=function(obj){
obj$c2<-10
print(obj$c1*obj$c2)
upd=eval(parse(text=deparse(obj$update)))
upd(obj)
print(obj$c1*obj$c2)
}
particular1()
> particular1()
[1] 80
[1] 15
[1] 80
I would like to have: 80, 15, 150. But, the function obj$update change the
value locally and do not change the "global" value of obj$c1.
I think it is a problem related environment of the function (I have read
the previous discussion on this list "do.call and environment") but
can not
find how to solve it.
Hope that somebody can help me,
Sincerely.
St?phane DRAY
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D?partement des Sciences Biologiques
Universit? de Montr?al, C.P. 6128, succursale centre-ville
Montr?al, Qu?bec H3C 3J7, Canada
Tel : 514 343 6111 poste 1233
E-mail : stephane.dray at umontreal.ca
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Web http://www.steph280.freesurf.fr/
