[R] Odp: data.frame

[Petr PIKAL]

Hi

Why scratching your left ear with your right hand?

If M is numeric matrix

d.m <- data.frame(M)
names(d.m) <- paste("Rep", 1:dim(M)[2], sep="")

not sure what you want as row names as var is not defined anywhere in your 
code, but you can use the same principle for changing row names. Jus use

row.names(d.m) <- whatever vector of names you can elaborate

Regards

Petr Pikal
petr.pikal at precheza.cz

BTW. R is not C and you shall use strong features of R not to try to avoid 
them.


r-help-bounces at stat.math.ethz.ch napsal dne 18.06.2007 15:40:38:

> 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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