i'm trying to build a little summary table for the contents of a data frame.
t<-sapply(macro, data.class)
c<-sapply(macro, length)
m<-sapply(macro, mean, na.rm=T, digits=2)
cbind(type=t, n=c , mean=m)
I want to drop the variables that are factors so I can include -max- and
-min- in my table.
-macro- contacts the data--how do I drop the variables according to their
data.class
thanks,
michael foster
________________________________________________
E. Michael Foster
(W) 814-865-1923
(Fax) 814-863-0000
After 7/1
Work:
Professor of Maternal and Child Health
School of Public Health
University of North Carolina, Chapel Hill
Rosenau Hall, CB# 7445
Chapel Hill, NC 27599-7445
Home:
309 Old Larkspur Way
Chapel Hill, NC 27516
UNC School of Public Health--voted #2 SPH by
. US News
. Association of Hand-to-Fin Carp Fisherman
. Iron Chef (not to be confused with the Iron Dukes!)
try this
# to get only the factors
macro.f <- macro[sapply(macro, is.factor)]
to drop the factors
macro.nf <- macro[sapply(macro, !is.factor)]
# to get only numerics
macro.n <- macro[sapply(macro, is.numeric)]
and so on.
I hope it helps.
Best,
Dimitris
----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/16/336899
Fax: +32/16/337015
Web: http://www.med.kuleuven.be/biostat/
http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm
----- Original Message -----
From: "E. Michael Foster" <foster at pop.psu.edu>
To: <r-help at stat.math.ethz.ch>
Sent: Friday, June 17, 2005 4:57 PM
Subject: [R] drop elements of vector by class
> i'm trying to build a little summary table for the contents of a
> data frame.
>
> t<-sapply(macro, data.class)
> c<-sapply(macro, length)
> m<-sapply(macro, mean, na.rm=T, digits=2)
> cbind(type=t, n=c , mean=m)
>
> I want to drop the variables that are factors so I can include -max-
> and
> -min- in my table.
> -macro- contacts the data--how do I drop the variables according to
> their
> data.class
>
> thanks,
> michael foster
>
>
>
>
> ________________________________________________
> E. Michael Foster
> (W) 814-865-1923
> (Fax) 814-863-0000
>
> After 7/1
>
> Work:
> Professor of Maternal and Child Health
> School of Public Health
> University of North Carolina, Chapel Hill
> Rosenau Hall, CB# 7445
> Chapel Hill, NC 27599-7445
>
> Home:
> 309 Old Larkspur Way
> Chapel Hill, NC 27516
>
>
> UNC School of Public Health--voted #2 SPH by
> . US News
> . Association of Hand-to-Fin Carp Fisherman
> . Iron Chef (not to be confused with the Iron Dukes!)
>
> ______________________________________________
> 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
>
a <- data.frame(a = 1:2, b = c("a", "b"), c =
I(c("a", "b")))
a <- a[ , !sapply(a, class) %in% "factor"]
-----Original Message-----
From: E. Michael Foster [mailto:foster at pop.psu.edu]
Sent: Friday, June 17, 2005 10:58 AM
To: r-help at stat.math.ethz.ch
Subject: [R] drop elements of vector by class
i'm trying to build a little summary table for the contents of a data
frame.
t<-sapply(macro, data.class)
c<-sapply(macro, length)
m<-sapply(macro, mean, na.rm=T, digits=2)
cbind(type=t, n=c , mean=m)
I want to drop the variables that are factors so I can include -max- and
-min- in my table.
-macro- contacts the data--how do I drop the variables according to
their
data.class
thanks,
michael foster
________________________________________________
E. Michael Foster
(W) 814-865-1923
(Fax) 814-863-0000
After 7/1
Work:
Professor of Maternal and Child Health
School of Public Health
University of North Carolina, Chapel Hill
Rosenau Hall, CB# 7445
Chapel Hill, NC 27599-7445
Home:
309 Old Larkspur Way
Chapel Hill, NC 27516
UNC School of Public Health--voted #2 SPH by
. US News
. Association of Hand-to-Fin Carp Fisherman
. Iron Chef (not to be confused with the Iron Dukes!)
______________________________________________
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