Try this to see which colors the codes are:
Color <- function(color){
z <- matrix(1:length(color), ncol = length(color))
image(y = seq(1, length(color)),
z, col = color, axes = FALSE)
text(0, y = z, labels = color, pos = 1, offset = 0, cex = 0.7)
}
Color(topo.colors(5))
Color(terrain.colors(10))
You can use levelplot from lattice package too.
On Sun, Sep 6, 2009 at 11:50 AM, FMH <kagba2...@yahoo.com> wrote:
> Hi,
>
> Thank you for your response. I'm looking for the names of the
> colors denoted by these codes and what do these colors represent for.
> For instance, if we use topo.colors(5) in the image function, five
> different colors will be used in which its codes are denoted as:
>
> [1] "#4C00FFFF" "#004CFFFF" "#00E5FFFF" "#00FF4DFF" "#FFFF00FF"
>
> So, my first question is what type of color do these codes represent
> for? Are they white, red,...?
>
> My second question is, if we use this topo.colors(5) in image function to
> denote the temperature values for intance, what are these colors represent
> for? Does the first color, "#4C00FFFF" represent the lower/medium/higher
> temperature?
>
> I do hope you could advice me on this matter?
>
> Thank you
> Fir
>
>
>
>
> ----- Original Message ----
> From: FMH <kagba2...@yahoo.com>
> To: Steve Lianoglou <mailinglist.honey...@gmail.com>
> Sent: Sunday, September 6, 2009 3:41:02 PM
> Subject: Re: [R] Color index in image function
>
> Hi,
>
> Thank you for your response. I'm looking for the name of the colors denoted
> by this code and what are these colors representing for.
>
> For instance, if we use topo.colors(5) in the image function, five
> different colors will be used in which its codes are denoted as:
>
> [1] "#4C00FFFF" "#004CFFFF" "#00E5FFFF" "#00FF4DFF" "#FFFF00FF"
>
> So, my first question is what type of color does these codes represent
> for? Are they white, red,...?
>
> My second question is, if we use this topo.colors(5) in image function to
> denote the temperature values for intance, what are these colors represent
> for? Does the first color, "#4C00FFFF" represent the lower/medium/higher
> temperature?
>
> I do hope you could advice me on this matter?
>
> Thank you
> Fir
>
>
>
>
>
>
>
> ----- Original Message ----
> From: Steve Lianoglou <mailinglist.honey...@gmail.com>
> To: FMH <kagba2...@yahoo.com>
> Cc: r-help@r-project.org
> Sent: Sunday, September 6, 2009 3:20:25 PM
> Subject: Re: [R] Color index in image function
>
> Hi,
>
> On Sat, Sep 5, 2009 at 7:06 AM, FMH<kagba2...@yahoo.com> wrote:
> > Dear All,
> >
> > I was looking for the color index in image function, such as from
> topo.colors(n) and etc. but still never found it. For instance, from the
> help menu.
>
> The answer is in the code:
>
> > ###########################################
> > # Volcano data visualized as matrix. Need to transpose and flip
> > # matrix horizontally.
> > image(t(volcano)[ncol(volcano):1,])
> >
> > # A prettier display of the volcano
> > x <- 10*(1:nrow(volcano))
> > y <- 10*(1:ncol(volcano))
> > image(x, y, volcano, col = terrain.colors(100), axes = FALSE)
>
> Right here:
>
> R> terrrain.colors(100)
>
> [1] "#00A600FF" "#03A700FF" "#07A800FF" "#0AAA00FF" "#0EAB00FF" ...
>
> Is that what you mean?
> -steve
>
> --
> Steve Lianoglou
> Graduate Student: Computational Systems Biology
> | Memorial Sloan-Kettering Cancer Center
> | Weill Medical College of Cornell University
> Contact Info:
> http://cbio.mskcc.org/~lianos/contact<http://cbio.mskcc.org/%7Elianos/contact>
>
>
>
>
> ______________________________________________
> R-help@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.
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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