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Hi
I would like to have a data.frame, where one column contains functions,
and another one lists. i.e.:
FUN <- function(l) {return(l$a+l$b+l$c}
LIST <- list(a=1, b=2, c=3)
d <- data.frame(fun=FUN, no=LIST, value=2, b=TRUE)
FUN <- function(l) {return(l$a*l$b*l$c}
LIST <- list(a=4, b=5, c=6)
d <- rbind(d, data.frame(fun=FUN, no=LIST, value=2, b=FALSE)
I would like
d$FUN[1](d$l[1] == 6
to be TRUE
I want to use it to save a parameterset for a simulation model, which
consists of functions, lists, and vectors of different length.
Is this possible?
Cheers,
Rainer
- --
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)
Centre of Excellence for Invasion Biology
Natural Sciences Building
Office Suite 2039
Stellenbosch University
Main Campus, Merriman Avenue
Stellenbosch
South Africa
Tel: +33 - (0)9 53 10 27 44
Cell: +27 - (0)8 39 47 90 42
Fax (SA): +27 - (0)8 65 16 27 82
Fax (D) : +49 - (0)3 21 21 25 22 44
Fax (FR): +33 - (0)9 58 10 27 44
email: Rainer at krugs.de
Skype: RMkrug
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It sounds like you want to use a "list" instead of a dataframe, especially if the elements are a different length.> d <- list() # initialize > d[[length(d) + 1]] <- list() # extend > d[[length(d)]]$fun <- sin # add a function > d[[length(d) + 1]] <- list() # extend again > d[[length(d)]]$fun <- cos # another function > d[[length(d)]]$val <- 42 # some value > d[[1]] [[1]]$fun function (x) .Primitive("sin") [[2]] [[2]]$fun function (x) .Primitive("cos") [[2]]$val [1] 42 On Wed, Dec 8, 2010 at 5:08 AM, Rainer M Krug <r.m.krug at gmail.com> wrote:> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi > > I would like to have a data.frame, where one column contains functions, > and another one lists. i.e.: > > FUN <- function(l) {return(l$a+l$b+l$c} > LIST <- list(a=1, b=2, c=3) > > d <- data.frame(fun=FUN, no=LIST, value=2, b=TRUE) > > FUN <- function(l) {return(l$a*l$b*l$c} > LIST <- list(a=4, b=5, c=6) > > d <- rbind(d, data.frame(fun=FUN, no=LIST, value=2, b=FALSE) > > I would like > d$FUN[1](d$l[1] == 6 > to be TRUE > > I want to use it to save a parameterset for a simulation model, which > consists of functions, lists, and vectors of different length. > > Is this possible? > > > Cheers, > > Rainer > > - -- > Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation > Biology, UCT), Dipl. Phys. (Germany) > > Centre of Excellence for Invasion Biology > Natural Sciences Building > Office Suite 2039 > Stellenbosch University > Main Campus, Merriman Avenue > Stellenbosch > South Africa > > Tel: ? ? ? ?+33 - (0)9 53 10 27 44 > Cell: ? ? ? +27 - (0)8 39 47 90 42 > Fax (SA): ? +27 - (0)8 65 16 27 82 > Fax (D) : ? +49 - (0)3 21 21 25 22 44 > Fax (FR): ? +33 - (0)9 58 10 27 44 > email: ? ? ?Rainer at krugs.de > > Skype: ? ? ?RMkrug > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.10 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAkz/WSIACgkQoYgNqgF2egocEwCeIErcuxDxVa8RFs1SlWiY/hQp > T84An1XAtE3tFNKajBnGQngTig4srlIb > =6AG3 > -----END PGP SIGNATURE----- > > ______________________________________________ > R-help at 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. >-- Jim Holtman Data Munger Guru What is the problem that you are trying to solve?
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 12/08/2010 11:22 AM, jim holtman wrote:> It sounds like you want to use a "list" instead of a dataframe,No - I would like to have a data,frame. I am aware of the differences, but as far as I understand, each column in a data.frame can have a differnt type. So I thought that the type of column fun could be "function", column no "list", column value "numeric" and column b "boolean".> especially if the elements are a different length.OK - forget about the different length - I could convert the vectors to lists, and store them as lists in the data.frame (if possible).> >> d <- list() # initialize >> d[[length(d) + 1]] <- list() # extend >> d[[length(d)]]$fun <- sin # add a function >> d[[length(d) + 1]] <- list() # extend again >> d[[length(d)]]$fun <- cos # another function >> d[[length(d)]]$val <- 42 # some value >> d > [[1]] > [[1]]$fun > function (x) .Primitive("sin") > > > [[2]] > [[2]]$fun > function (x) .Primitive("cos") > > [[2]]$val > [1] 42Sure - that would work, but I would prefer to have it in a data.frame. Cheers, Rainer> > > On Wed, Dec 8, 2010 at 5:08 AM, Rainer M Krug <r.m.krug at gmail.com> wrote: > Hi > > I would like to have a data.frame, where one column contains functions, > and another one lists. i.e.: > > FUN <- function(l) {return(l$a+l$b+l$c} > LIST <- list(a=1, b=2, c=3) > > d <- data.frame(fun=FUN, no=LIST, value=2, b=TRUE) > > FUN <- function(l) {return(l$a*l$b*l$c} > LIST <- list(a=4, b=5, c=6) > > d <- rbind(d, data.frame(fun=FUN, no=LIST, value=2, b=FALSE) > > I would like > d$FUN[1](d$l[1] == 6 > to be TRUE > > I want to use it to save a parameterset for a simulation model, which > consists of functions, lists, and vectors of different length. > > Is this possible? > > > Cheers, > > Rainer > >>______________________________________________ R-help at 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.>>- -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Natural Sciences Building Office Suite 2039 Stellenbosch University Main Campus, Merriman Avenue Stellenbosch South Africa Tel: +33 - (0)9 53 10 27 44 Cell: +27 - (0)8 39 47 90 42 Fax (SA): +27 - (0)8 65 16 27 82 Fax (D) : +49 - (0)3 21 21 25 22 44 Fax (FR): +33 - (0)9 58 10 27 44 email: Rainer at krugs.de Skype: RMkrug -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkz/YQEACgkQoYgNqgF2egoTSACfVeYcUqQZCXgxAEqWVw/bYmhm onUAoIXfDH7dFw+X8P7eEw7fX62cEUzf =YjUK -----END PGP SIGNATURE-----