It is perhaps worth saying that my prior suggestion may not be the best strategy for doing what you want. The previous poster needed the actual expression to deparse as a label. If you only need the expression as a function to be evaluated, it may be better to pass the argument as a function -- a feature of functional programming languages like R. For example:
top <- function(x, fun)fun(x) f <- function(x)x^2 + sin(x) top(1:4, f) Again, appropriate sections of the R Language Reference or web tutorials provide details. Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Thu, Jun 6, 2019 at 11:24 AM Bert Gunter <bgunter.4...@gmail.com> wrote: > See here for almost the same issue: > > > http://r.789695.n4.nabble.com/Pasting-R-code-lines-into-labels-td4757446.html > > Same answer: pass the unevaluated formula (i.e. an R expression) using > substitute/quote. Then evaluate it appropriately using eval. Same > references. > > Bert Gunter > > "The trouble with having an open mind is that people keep coming along and > sticking things into it." > -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) > > > On Thu, Jun 6, 2019 at 11:08 AM Frank S. <f_j_...@hotmail.com> wrote: > >> Dear all, >> >> I have defined an R function g(y) wich in turn is inside other R function >> f(x). The function g(y) depends on an >> equation, and I would like to know if such an equation could be passed as >> an argument of the main function >> (taking into account that we should change the variable "x" to "y"). >> As an example, I have: >> >> function(x) { # Main function, called f(x) >> >> ----- (code) >> >> function(y) { # Sub-function, called g(y) >> ----- (code) >> eq <- y^2 -3*y >> ----- (code) >> } >> >> ----- (code) >> >> } >> >> In summary, I would like to know is there is any way to: >> Put the equation "eq" as an argument of the main function f(x). >> >> >> Thank you very much! >> >> Frank >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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. >> > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
