[R] help with heatmap - how to remove annoying "X" before numeric values?

[Gabor Grothendieck]

read.table is doing that, not heatmap.2.  Use
   read.table("temp.txt", header = TRUE, check.names = FALSE)

On 7/18/07, Suzanne Matthews <suzanne.j.matthews at gmail.com> wrote:
> Hello All,
>
> I have a simple question based on how things are labeled on my heat map;
> particularly, there is this annoying "X" that appears before the numeric
> value of all the labels of my columns.
>
> Let's say I have the following silly data, stored in "temp.txt"
>        1905    1910    1950    1992    2011    2020
> Gnat    0.08    0.29    0.29    0.37    0.39    0.43
> Snake   0.16    0.34    0.32    0.40    0.41    0.53
> Bat     0.40    0.54    0.52    0.60    0.60    0.63
> Cat     0.16    0.27    0.29    0.39    0.37    0.41
> Dog     0.43    0.54    0.52    0.61    0.60    0.62
> Lynx    0.50    0.57    0.54    0.59    0.5     0.59
>
> I use the following commands to generate my heatmap:
> heat <- read.table('temp.txt')
> x <- as.matrix(heat)
>
> heatmap.2(x, keysize=1.2, dendrogram="none", trace="none", Colv = FALSE,
> main = "Silly Data", labCol=
> NULL, margin=c(7,8))
>
> This generates a very nice heatmap, but there is one thing I have an issue
> with: How do I get rid of the 'X' that seems to come automatically before my
> numeric column values? I just want those columns to be labeled 1905, 1910,
> 1950, and so on. I cannot find anything in the heatmap.2 documentation that
> suggests how I should do this.
>
> Thank you very much for your time, and patience in reading this!
>
> Sincerely,
> Suzanne
>
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