[R] options --- na.rm , save-on-exit

[Uwe Ligges]

ivo_welch-rstat8783 at mailblocks.com wrote:
> 
> dear R wizzards:  two options() related questions.
> 
> [a] options(na.action):  many of my variables have missing variables, so 
> I would like to set a default to ignore, especially in univariate 
> functions like mean() and median() .  alas, without na.rm=T in the 
> functions themselves, I always get an NA.  my code is full of na.rm=T is 
> there a magic invokation of options with na.action that is honored by 
> these functions?

No.


> [b] options(?): how do I get R to not prompt me for saving the workspace 
> upon exit, but to instead automatically save the command history 
> .Rhistory but not the data .RData ?

you can define a function like:

Q <- function (save = "no", status = 0, runLast = TRUE){
   savehistory()
   .Internal(quit(save, status, runLast))
}

and call Q(), if you want to exit.

Uwe Ligges



> help appreciated.
> 
> sincerely,
> 
> /iaw
> ---
> ivo welch
> professor of finance and economics
> brown / nber / yale
> 
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