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 <

[hidden email]> 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. <

[hidden email]> 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]]

>>

>> ______________________________________________

>>

[hidden email] 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]]

______________________________________________

[hidden email] mailing list -- To UNSUBSCRIBE and more, see

https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide

http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.