Hi Ramón,
May be this helps:
tags_totals<-matrix(c(15,11,23,7,5),ncol=1,dimnames=list(c("Wikis","Glosarios","Grupos","Bases
de datos","Taller"),NULL))
tags_totals[order(tags_totals[,1],decreasing=TRUE),,drop=FALSE]
# [,1]
#Grupos 23
#Wikis 15
#Glosarios 11
#Bases de datos 7
#Taller 5
A.K.
Hello,
I have a matrix like this:
> tags_totals
[,1]
Wikis 15
Glosarios 11
Grupos 23
Bases de datos 7
Taller 5
And I want to order by the value of the first column. I do this:
ordered_matrix <-
as.matrix(tags_totals[order(tags_totals[,1],decreasing=TRUE)])
It orders alright, but I lose the rownames, that I need for the graphics
> ordered_matrix
[,1]
[1,] 23
[2,] 15
[3,] 11
[4,] 7
[5,] 5
> rownames(ordered_matrix)
NULL
If I try to do it after converting to a dataframe I get an error that I don't
understand:
> tags_totals_frame <- as.data.frame(tags_totals)
> tags_totals_frame[,1]
[1] 15 11 23 7 5
> ordered_frame <-
> tags_totals_frame[order(tags_totals_frame[,1],decreasing=TRUE)]
Error en `[.data.frame`(tags_totals_frame, order(tags_totals_frame[, 1], :
undefined columns selected
Thanks on any help,
--
==================================
Ramón Ovelar
Campus Virtual Birtuala UPV/EHU
Tel: (34) 94 601 3407
http://campusvirtual.ehu.es
______________________________________________
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.
