[R] sys.frame() and variables from parent frame

[José Miguel Delgado]

Dear R-help,

I wrote the following lines in order to use a variable from a parent 
frame in my callM() function. I would like to solve this by only editing 
the callM(function). When I run this code I obtain a empty list, meaning 
that eval(ls(),sys.frame(-1)) could not access the variables in the 
parent function. Any suggestions? Thanks in advance!

metaCall <- function()
   {
     NN <- 99
     callM()
     }

callM <- function()
   {
     Ls <- eval(ls(),sys.frame(-1))
     print(Ls)
     ### use Ls to call a certain model named M
     }

metaCall()




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   Zé Miguel
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