On Fri, Feb 12, 2010 at 1:38 AM, Sharpie <ch...@sharpsteen.net> wrote: > > > djhurio wrote: >> >> I believe there is not such thing as source code for a variable. I believe >> if you define x=y*y, x is keeping only the values of y*y, but not how they >> were computed. Am I right? >> > > In general yes. Basic variables do not store a copy of the function call > that created them. > > However, some objects have been build to store a memory of how they were > created. Take for example a linear model: > > model <- lm( demand ~ Time, data = BOD ) > > One of the components of the `model` variable is called call and it stores a > language object that is a copy of the lm function call that was used to > generate `model`: > >> model$call > lm(formula = demand ~ Time, data = BOD) > > This object could be passed to the eval() function to basically re-run the > operation that generated `lm`. > > The str() function can be used to discover what sorts of tidbits may be > hiding inside a variable.
Since there is no solution to my original question. Let me change it a bit and see if there is a solution. Rscript essentially parse the R file. I have no idea how Rscript works. Do you know how to modify it to spit out the original code for the assignment of a variable? ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
