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

[Moshe Olshansky]

I was right saying that my solution was not the best
possible!

--- Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote:

> read.table('temp.txt', check.names = FALSE)
> 
> would be easier (and more general, since make.names
> can do more than 
> prepend an 'X').
> 
> On Wed, 18 Jul 2007, Moshe Olshansky wrote:
> 
> > 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]]
> >>
> >> ______________________________________________
> >> R-help at stat.math.ethz.ch 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.
> >>
> >
> > ______________________________________________
> > R-help at stat.math.ethz.ch 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.
> >
> 
> -- 
> Brian D. Ripley,                 
> ripley at stats.ox.ac.uk
> Professor of Applied Statistics, 
> http://www.stats.ox.ac.uk/~ripley/
> University of Oxford,             Tel:  +44 1865
> 272861 (self)
> 1 South Parks Road,                     +44 1865
> 272866 (PA)
> Oxford OX1 3TG, UK                Fax:  +44 1865
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>