[R] heatmap/image from csv data
Liat
liats80 at hotmail.com
Thu Dec 10 16:19:25 CET 2009
I have looked at the help for data.matrix. But didn't find a solution.
data.matrix only gets two arguments the data and a logical rownames.force -
I have tried to change this logical to TRUE but that doesn't help.
Any advice would be greatly appreciated.
Thanks!!
Liat wrote:
>
> Hi all,
> I'm trying to use heat.map to display some data.
> The data is originally in csv format and when I read it in R using
> read.table I get:
> a b c d e
> 1 A 1 1 1 1
> 2 B 1 0 1 1
> 3 C 0 1 0 1
> 4 D 1 1 1 0
> 5 E 1 0 0 0
> The problem is, that for heatmap I need a numerical matrix. When using
> data.matrix I get:
> a b c d e
> [1,] 1 1 1 1 1
> [2,] 2 1 0 1 1
> [3,] 3 0 1 0 1
> [4,] 4 1 1 1 0
> [5,] 5 1 0 0 0
> So I get numerical... but I loss the row names. I would like to see these
> names as the y axis labels.
> What is the correct/easiest way of achieving this?
> Many thanks!!!
>
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