[R] heatmap/image from csv data

[David Winsemius]

On Dec 10, 2009, at 8:25 AM, 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.

Look (again?)  at the help page for data.matrix.


> What is the correct/easiest way of achieving this?
> Many thanks!!!
> -- 
> View this message in context: http://n4.nabble.com/heatmap-image-from-csv-data-tp956968p956968.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at 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.

David Winsemius, MD
Heritage Laboratories
West Hartford, CT