Re: [R] Newbie: Examples on functions callling a library etc.
Hi
Many thanks. I got another post to this list that gives an example of what
I need exactly, that is, require and ::
Cheers
Ed
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Ben Bolker
Sent: Thursday, August 28, 2008 11:44 PM
To: [EMAIL PROTECTED]
Subject: Re: [R] Newbie: Examples on functions callling a library etc.
Eduardo M. A. M.Mendes gmail.com> writes:
> R is pretty new to me. I need to write a function that returns three
> matrices of different dimensions. In addition, I need to call a function
> from a contributed package with the function. I have browsed several
> manuals and docs but the examples on them are either very simple or
> extremely hard to follow.
>
> Many thanks
>
> Ed
>
I think you need to try to specify your needs a little bit
more carefully. Here is a function that technically meets
your needs:
library("example_pkg") ## to load the contributed package
myfunction <- function() { ## function with no arguments
foo()## assuming the function "foo" is in the package
list(matrix(nrow=2,ncol=2),matrix(nrow=3,ncol=3),matrix(nrow=4,ncol=4)
}
But I suspect that doesn't really do what you need ...
Ben Bolker
__
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Re: [R] Newbie: Examples on functions callling a library etc.
Hi Steve
That is exactly what I want. Many thanks.
Ed
-Original Message-
From: Steven McKinney [mailto:[EMAIL PROTECTED]
Sent: Thursday, August 28, 2008 11:48 PM
To: Eduardo M. A. M.Mendes; r-help@r-project.org
Subject: RE: [R] Newbie: Examples on functions callling a library etc.
Hi Ed,
Here's a simple example showing your needs:
myfun <- function(n1, n2, n3) {
mat1 <- matrix(rep(1), nrow = n1, ncol = 3)
mat2 <- matrix(rep(2), nrow = n2, ncol = 4)
mat3 <- matrix(rep(3), nrow = n3, ncol = 5)
require("survival") ## make sure the package you need is loaded
mypkgfun <- survival::is.Surv ## Use the '::' and ':::' extractors to get
visible and hidden functions respectively from the package
list(mat1 = mat1, mat2 = mat2, mat3 = mat3, mypkgfun = mypkgfun) ## Return
the items in a list
}
## Now invoke the function
foo <- myfun(n1 = 1, n2 = 1, n3 = 5)
## and look at the returned results
foo
> myfun <- function(n1, n2, n3) {
+ mat1 <- matrix(rep(1), nrow = n1, ncol = 3)
+ mat2 <- matrix(rep(2), nrow = n2, ncol = 4)
+ mat3 <- matrix(rep(3), nrow = n3, ncol = 5)
+
+ require("survival")
+ mypkgfun <- survival::is.Surv
+
+ list(mat1 = mat1, mat2 = mat2, mat3 = mat3, mypkgfun = mypkgfun)
+ }
>
> foo <- myfun(n1 = 1, n2 = 1, n3 = 5)
>
> foo
$mat1
[,1] [,2] [,3]
[1,]111
$mat2
[,1] [,2] [,3] [,4]
[1,]2222
$mat3
[,1] [,2] [,3] [,4] [,5]
[1,]33333
[2,]33333
[3,]33333
[4,]33333
[5,]33333
$mypkgfun
function (x)
inherits(x, "Surv")
>
HTH
Steve McKinney
-Original Message-
From: [EMAIL PROTECTED] on behalf of Eduardo M. A. M.Mendes
Sent: Thu 8/28/2008 5:43 PM
To: r-help@r-project.org
Subject: [R] Newbie: Examples on functions callling a library etc.
Hello
R is pretty new to me. I need to write a function that returns three
matrices of different dimensions. In addition, I need to call a function
from a contributed package with the function. I have browsed several
manuals and docs but the examples on them are either very simple or
extremely hard to follow.
Many thanks
Ed
[[alternative HTML version deleted]]
__
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.
__
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.
Re: [R] Newbie: Examples on functions callling a library etc.
Hi Ed,
Here's a simple example showing your needs:
myfun <- function(n1, n2, n3) {
mat1 <- matrix(rep(1), nrow = n1, ncol = 3)
mat2 <- matrix(rep(2), nrow = n2, ncol = 4)
mat3 <- matrix(rep(3), nrow = n3, ncol = 5)
require("survival") ## make sure the package you need is loaded
mypkgfun <- survival::is.Surv ## Use the '::' and ':::' extractors to get
visible and hidden functions respectively from the package
list(mat1 = mat1, mat2 = mat2, mat3 = mat3, mypkgfun = mypkgfun) ## Return
the items in a list
}
## Now invoke the function
foo <- myfun(n1 = 1, n2 = 1, n3 = 5)
## and look at the returned results
foo
> myfun <- function(n1, n2, n3) {
+ mat1 <- matrix(rep(1), nrow = n1, ncol = 3)
+ mat2 <- matrix(rep(2), nrow = n2, ncol = 4)
+ mat3 <- matrix(rep(3), nrow = n3, ncol = 5)
+
+ require("survival")
+ mypkgfun <- survival::is.Surv
+
+ list(mat1 = mat1, mat2 = mat2, mat3 = mat3, mypkgfun = mypkgfun)
+ }
>
> foo <- myfun(n1 = 1, n2 = 1, n3 = 5)
>
> foo
$mat1
[,1] [,2] [,3]
[1,]111
$mat2
[,1] [,2] [,3] [,4]
[1,]2222
$mat3
[,1] [,2] [,3] [,4] [,5]
[1,]33333
[2,]33333
[3,]33333
[4,]33333
[5,]33333
$mypkgfun
function (x)
inherits(x, "Surv")
>
HTH
Steve McKinney
-Original Message-
From: [EMAIL PROTECTED] on behalf of Eduardo M. A. M.Mendes
Sent: Thu 8/28/2008 5:43 PM
To: r-help@r-project.org
Subject: [R] Newbie: Examples on functions callling a library etc.
Hello
R is pretty new to me. I need to write a function that returns three
matrices of different dimensions. In addition, I need to call a function
from a contributed package with the function. I have browsed several
manuals and docs but the examples on them are either very simple or
extremely hard to follow.
Many thanks
Ed
[[alternative HTML version deleted]]
__
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.
__
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.
Re: [R] Newbie: Examples on functions callling a library etc.
Eduardo M. A. M.Mendes gmail.com> writes:
> R is pretty new to me. I need to write a function that returns three
> matrices of different dimensions. In addition, I need to call a function
> from a contributed package with the function. I have browsed several
> manuals and docs but the examples on them are either very simple or
> extremely hard to follow.
>
> Many thanks
>
> Ed
>
I think you need to try to specify your needs a little bit
more carefully. Here is a function that technically meets
your needs:
library("example_pkg") ## to load the contributed package
myfunction <- function() { ## function with no arguments
foo()## assuming the function "foo" is in the package
list(matrix(nrow=2,ncol=2),matrix(nrow=3,ncol=3),matrix(nrow=4,ncol=4)
}
But I suspect that doesn't really do what you need ...
Ben Bolker
__
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.
[R] Newbie: Examples on functions callling a library etc.
Hello R is pretty new to me. I need to write a function that returns three matrices of different dimensions. In addition, I need to call a function from a contributed package with the function. I have browsed several manuals and docs but the examples on them are either very simple or extremely hard to follow. Many thanks Ed [[alternative HTML version deleted]] __ 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.
