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

[Moshe Olshansky]

Hi Suzanne,

My solution (which I am sure is not the best) would
be:

> heat <- read.table('temp.txt')
> heat
      X1905 X1910 X1950 X1992 X2011 X2020
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  0.50  0.59
> a<-names(heat)
> b<-strsplit(a,split="X")
> w<-unlist(b)
> w
 [1] ""     "1905" ""     "1910" ""     "1950" ""    
"1992" ""     "2011" ""     "2020"
> z <- w[seq(2,length(w),by=2)]
> z
[1] "1905" "1910" "1950" "1992" "2011" "2020"
> names(heat) <- z
> heat
      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 0.50 0.59
> 

Regards,

Moshe.

--- 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
> 
> 	[[alternative HTML version deleted]]
> 
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