hello,
are there functions giving the columns number and the rows number of a matrix?
thanks.
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See help(dim) and please read the manuals before asking basic questions like this. Thank you. elyakhlifi mustapha wrote:> hello, > are there functions giving the columns number and the rows number of a matrix? > thanks. > > > _____________________________________________________________________________ > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > > >
On 6/18/07, elyakhlifi mustapha <elyakhlifi_mustapha@yahoo.fr> wrote:> > hello, > are there functions giving the columns number and the rows number of a > matrix?Yes, there are. Are you trying to use R without reading *any* documentation??? The mailing list is not a substitute for the manuals. See the Posting guide. Christophe thanks.> > > > _____________________________________________________________________________ > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@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. >-- Christophe Pallier (http://www.pallier.org) [[alternative HTML version deleted]]
hello,
I'm trying to write a function which take a matrix and give a dataframe with
column names and row names but the problem I meet it's that the column
number is changing and the vector containing the column names is also changing
how can I do to write a good progam for the moment I tryied like follow:
dm <- ncol(M)
v <- vector()
t <- 1
while (dm > 0) {
v <- c(v,paste("Rép",t,sep=""))
t <- t + 1
dm <- dm - 1
}
nv <- noquote(v)
df <- function (M,x) {
return(data.frame(nv[1] = M[,1], nv[2] = M[,2],nv[3] = M[,3], row.names =
var[[1]], check.rows = TRUE, check.names = TRUE))
}
I know that there are errors but the important is that R doesn't recognize
nv.
For more precision the martix M is like follow:
M
[,1] [,2] [,3]
[1,] 6.52 NA 6.59
[2,] 6.99 6.85 6.38
[3,] 6.92 6.72 6.99
[4,] 6.59 5.51 6.45
[5,] 6.65 7.12 6.99
[6,] 6.18 5.71 5.78
[7,] 6.65 6.52 6.72
[8,] 6.65 6.79 6.12
[9,] 6.59 6.65 6.32
[10,] 5.85 6.05 6.38
[11,] 6.38 6.79 6.65
[12,] 6.79 6.52 6.72
[13,] 6.12 6.25 6.38
[14,] 6.99 6.72 6.38
[15,] 6.59 6.65 6.99
[16,] 6.45 6.18 6.59
[17,] 5.65 6.05 6.52
[18,] 6.52 6.85 6.65
[19,] 6.18 6.32 6.32
[20,] 6.99 6.65 6.72
[21,] 6.52 6.99 6.32
Can you help me?
thanks.
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