Thank you




________________________________
From: Henrique Dallazuanna <wwwhsd@gmail.com>

Cc: r-help@r-project.org
Sent: Sunday, September 6, 2009 4:30:14 PM
Subject: Re: [R] Color index in image function

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.




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 ----

>To: Steve Lianoglou <mailinglist.honeypot@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.honeypot@gmail.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,
>

>> 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/%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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