Hi,
I have a function like this:
f <- function(f1) { ...}
f1 is a function name itself.
I have two candidates for f1, and each of them have different numbers
of arguments, say
f2 has 2 while f3 has 3.
then my question is, how to write f function so that I can pass
different funcation names with different number of parameters?
thanks.
--
Weiwei Shi, Ph.D
Research Scientist
GeneGO, Inc.
"Did you always know?"
"No, I did not. But I believed..."
---Matrix III
Try this: f <- function(f1, ...) f1(...) f(sin, 1) f(max, 1, 2) On 10/19/06, Weiwei Shi <helprhelp at gmail.com> wrote:> Hi, > > I have a function like this: > > f <- function(f1) { ...} > > f1 is a function name itself. > I have two candidates for f1, and each of them have different numbers > of arguments, say > f2 has 2 while f3 has 3. > > then my question is, how to write f function so that I can pass > different funcation names with different number of parameters? > > thanks. > > -- > Weiwei Shi, Ph.D > Research Scientist > GeneGO, Inc. > > "Did you always know?" > "No, I did not. But I believed..." > ---Matrix III > > ______________________________________________ > R-help at stat.math.ethz.ch 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. >
how do i assign "1" or "2" to some destination variable? i mean, how do i use something to represent ... in the defn. of f? On 10/19/06, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:> Try this: > > f <- function(f1, ...) f1(...) > f(sin, 1) > f(max, 1, 2) > > > On 10/19/06, Weiwei Shi <helprhelp at gmail.com> wrote: > > Hi, > > > > I have a function like this: > > > > f <- function(f1) { ...} > > > > f1 is a function name itself. > > I have two candidates for f1, and each of them have different numbers > > of arguments, say > > f2 has 2 while f3 has 3. > > > > then my question is, how to write f function so that I can pass > > different funcation names with different number of parameters? > > > > thanks. > > > > -- > > Weiwei Shi, Ph.D > > Research Scientist > > GeneGO, Inc. > > > > "Did you always know?" > > "No, I did not. But I believed..." > > ---Matrix III > > > > ______________________________________________ > > R-help at stat.math.ethz.ch 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. > > >-- Weiwei Shi, Ph.D Research Scientist GeneGO, Inc. "Did you always know?" "No, I did not. But I believed..." ---Matrix III
f <- function(f1, ...) {
args <- list(...)
lapply(args, print)
f1(...)
}
f(sin, pi)
On 10/19/06, Weiwei Shi <helprhelp at gmail.com>
wrote:> how do i assign "1" or "2" to some destination
variable?
> i mean, how do i use something to represent ... in the defn. of f?
>
> On 10/19/06, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> > Try this:
> >
> > f <- function(f1, ...) f1(...)
> > f(sin, 1)
> > f(max, 1, 2)
> >
> >
> > On 10/19/06, Weiwei Shi <helprhelp at gmail.com> wrote:
> > > Hi,
> > >
> > > I have a function like this:
> > >
> > > f <- function(f1) { ...}
> > >
> > > f1 is a function name itself.
> > > I have two candidates for f1, and each of them have different
numbers
> > > of arguments, say
> > > f2 has 2 while f3 has 3.
> > >
> > > then my question is, how to write f function so that I can pass
> > > different funcation names with different number of parameters?
> > >
> > > thanks.
> > >
> > > --
> > > Weiwei Shi, Ph.D
> > > Research Scientist
> > > GeneGO, Inc.
> > >
> > > "Did you always know?"
> > > "No, I did not. But I believed..."
> > > ---Matrix III
> > >
> > > ______________________________________________
> > > R-help at stat.math.ethz.ch 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.
> > >
> >
>
>
> --
> Weiwei Shi, Ph.D
> Research Scientist
> GeneGO, Inc.
>
> "Did you always know?"
> "No, I did not. But I believed..."
> ---Matrix III
>
thanks a lot! On 10/19/06, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:> f <- function(f1, ...) { > args <- list(...) > lapply(args, print) > f1(...) > } > f(sin, pi) > > > On 10/19/06, Weiwei Shi <helprhelp at gmail.com> wrote: > > how do i assign "1" or "2" to some destination variable? > > i mean, how do i use something to represent ... in the defn. of f? > > > > On 10/19/06, Gabor Grothendieck <ggrothendieck at gmail.com> wrote: > > > Try this: > > > > > > f <- function(f1, ...) f1(...) > > > f(sin, 1) > > > f(max, 1, 2) > > > > > > > > > On 10/19/06, Weiwei Shi <helprhelp at gmail.com> wrote: > > > > Hi, > > > > > > > > I have a function like this: > > > > > > > > f <- function(f1) { ...} > > > > > > > > f1 is a function name itself. > > > > I have two candidates for f1, and each of them have different numbers > > > > of arguments, say > > > > f2 has 2 while f3 has 3. > > > > > > > > then my question is, how to write f function so that I can pass > > > > different funcation names with different number of parameters? > > > > > > > > thanks. > > > > > > > > -- > > > > Weiwei Shi, Ph.D > > > > Research Scientist > > > > GeneGO, Inc. > > > > > > > > "Did you always know?" > > > > "No, I did not. But I believed..." > > > > ---Matrix III > > > > > > > > ______________________________________________ > > > > R-help at stat.math.ethz.ch 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. > > > > > > > > > > > > > -- > > Weiwei Shi, Ph.D > > Research Scientist > > GeneGO, Inc. > > > > "Did you always know?" > > "No, I did not. But I believed..." > > ---Matrix III > > >-- Weiwei Shi, Ph.D Research Scientist GeneGO, Inc. "Did you always know?" "No, I did not. But I believed..." ---Matrix III