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 ______________________________________________ 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.
