Displaying 20 results from an estimated 8000 matches similar to: "Colour to RGB value?"
2000 Feb 28
1
mapping of colornames into hsv?
I couldn't find this in online help or the archives:
Is there any R function or object giving the mapping of the colornames as
given by colors() into the hsv() model?
Regards
--
Dr. Jens Oehlschl?gel-Akiyoshi
MD FACTORY GmbH
Bayerstrasse 21
80335 M?nchen
Tel.: 089 545 28-27
Fax.: 089 545 28-10
http://www.mdfactory.de
2000 Feb 28
1
mapping of colornames into hsv?
I couldn't find this in online help or the archives:
Is there any R function or object giving the mapping of the colornames as
given by colors() into the hsv() model?
Regards
--
Dr. Jens Oehlschl?gel-Akiyoshi
MD FACTORY GmbH
Bayerstrasse 21
80335 M?nchen
Tel.: 089 545 28-27
Fax.: 089 545 28-10
http://www.mdfactory.de
2006 Jul 30
1
Log color scale
Hi all,
In response to a previous post about plotting a numeric square matrix
as a colored matrix, I was referred to both image and the
color2D.matplot function in the plotrix package. Both have worked for
me thanks!!
However I need to plot my data in a log transformed color scale. Is
this possible? I will be happy to explain further, but basically I
need to do this because there are large
2005 Aug 03
3
red-black-green color palette?
I'm working on some heatmaps, and the person I'm working with would
prefer a red-black-green color palette (red denoting gene induction and
green denoting gene repression). Does such a palette exist already?
If not, is there an easy way to create one?
Thanks,
Jake
2005 Dec 13
4
Ploting graphics using X tints from a color
Hi,
I'm trying to draw a 2D plot using multiple tints of red. The
(simplified) setup is the following: || year | x | y ||
My idea is that each year is plotted with a different tint of red.
Older year (lightest) -> Later year (darkest). I've managed to plot
this with different scales of grays simply by doing:
palette(gray(length(years):0/length(years)))
before the plot and for each
2010 Jan 28
2
color palette for points, lines, text / interactive Rcolorpicker?
I'm looking for a scheme to generate a default color palette for
plotting points, lines and text (on a white or transparent background)
with from 2 to say 9 colors with the following constraints:
- "red" is reserved for another purpose
- colors should be highly distinct
- avoid light colors (like "yellow"s)
In RColorBrewer, most of the schemes are designed for area fill
2002 Jul 06
5
about image and rgb
Hi all,
I have a 16 bit image (TIFF) and i want to analyse the pixels distribution.
So, i obtain a matrix which values are between 0 and 2^16 -1.
Now i would like to represnt this image with the fucntions rgb() and
image().
I am not sure , but i think that only 256 colors are available.
So is there a solution to represent all the palette of the colors or i
have to limit
the representations with
2012 Nov 23
1
invalid colour name 'rgb(1.000,0,0)' error
Hi,
I m working on latex and R and i need to dynamically generate colors.
r<-paste("rgb(1.000,",0,",",0,")",sep="") # i m generating dynamically by
paste command
cars <- c(1, 3, 6, 4, 9)
plot(cars, type="o", col=r) *Error in plot.xy(xy, type,
...) : invalid colour name 'rgb(1.000,0,0)'*
How to fix this
2005 Mar 30
5
2d plotting and colours
Hi!
I am new to R just 3 days in it and i apologize if my questions seem very
trivial and consumed your valuable time.
I am coding in perl and i stumbled upon R regarding plotting good
statistical graphs.
I tried the kmean clustering for a large matrix ,say > 150 * 150 . I tried
the example code given in the tutorial to perform 2d plot
# i ranges from 2 to 10
cl <- kmeans(x, i, 20)
2005 Jul 07
2
Brewer colours
Anyone who is interested in using optimal colour palettes should
look at the work of Cindy Brewer: www.colorbrewer.org
I have written code to use her colour schemes in R. It is
included below. Perhaps someone may find this interesting enough
to work into a package.
Included also is a function showpalette, which was posted here a
while back. I don't remember who wrote it.
I have copied all
2009 Aug 06
2
making scatter plot points fill semi-transparent
hi all,
i have a simple scatter plot, and i'd like to make it so the scatter
plot colors are slightly transparent. i see in a previous post that
someone mentioned the "alpha" parameter, but i am not sure how it can
be used with the 'plot' function [*].
for example, suppose i have:
plot(mydata$column1, mydata$column2, col="red", cex=1)
i now want to make it so
2009 Mar 13
5
Selecting / creating unique colours for behavioural / transitional data
Dear all,
This seems like a simple problem but i've searched the help files and tried
various options but failed, so apologies in advance for asking what i'm sure
is an easy thing to do!
In short, I have displayed behavioural data using the TraMineR package such
that there is a colour change between the transition of behaviours, however,
all the methods that i have used thus far have
2003 Oct 29
1
Wishlist: user-specified color names for palette() (PR#4836)
Full_Name: Hsiu-Khuern Tang
Version: 1.8.0
OS: GNU/Linux (Debian unstable)
Submission from: (NULL) (156.153.255.243)
Hi,
I use palette(rgb(red=..., green=..., blue=..., names=mycolors)) to define my
own color palette. After doing this, the names `mycolors' are not stored in
palette() anymore, so that palette() returns a mix of built-in color names and
RGB values.
Eg:
> palette()
2005 May 23
6
colors and palettes and things...
After trying to find if there was a color picker in the FAQs and the help,
I thought I would send a post here. I was overwhelmed with all the
wonderful color choices R has predefined (discovered after typing in
colors()) but can't figure out what they all (by name) look like. Is there
a color picker or some other method to display all those colors next to
the name?
I think I can put together
2023 Jul 23
2
col2rgb() function
Hello I have a palette vector of colour blind colours (in hexadecimal)
which I?m using for plots, but they are not see-through, and as I wanted to
overlay some histograms I wanted to convert these colours to rgb, when you
can set the opacity.
I have found the function col2rgb(), which works in the sense that it gives
a vector of numbers but these don?t work directly in rgb because they are
too
2013 Jul 24
1
Alpha channel in colorRamp() and colorRampPalette()
Hi all,
I had the need to create a colorbar considering the alpha channel of the colors, but colorRamp() and colorRampPalette() ignored the alpha argument in rgb(). So I performed some minor modifs. in their codes, as to support the interpolation using the alpha channel.
I guess that those simple modifications might be useful for other people, so perhaps it would be worth to add them to
2023 Jul 23
2
col2rgb() function
Thanks That works nicely Nick
On Sun, 23 Jul 2023 at 19:26, Ben Bolker <bbolker at gmail.com> wrote:
> Does adjustcolor() help?
>
> cb8<- c("#000000", "#E69F00", "#56B4E9", "#009E73","#F0E442", "#0072B2",
> "#D55E00", "#CC79A7")
> plot(0,0,xlim=c(1,8),ylim=c(0,1))
>
2012 Jul 10
2
RGB components of plot() colours
A quick question:
Is there anywhere a listing of the RGB components of the
named colours listed by colors()?
For example, where would I find the RGB for "orange1"
or "salmon"?
When I look at an EPS file from R where I have used
these colours, it seems that for:
"salmon":
0.9804 0.5020 0.4471 rgb
"orange1":
1 0.6471 0 rgb
However, this is a tedious way
2009 Nov 30
1
Continuous legend colors
Dear List,
I am trying to get a basic plot to show a continuous range of fill colors. It is probably easiest to demonstrate. I would like a legend like in the following example:
Satellite.Palette <-colorRampPalette(c("blue3","cyan","aquamarine","yellow","orange","red"))
require(fields)
image.plot(volcano, col = Satellite.Palette
2023 Jul 23
1
col2rgb() function
Just one addition which may or may not be useful: The color palette you
use is also known as "Okabe-Ito" and it is the default set of colors in
the palette.colors() function. This function also has an optional alpha
argument. So if you want to generate these colors with an alpha of 0.3 you
can also do:
palette.colors(8, alpha = 0.3)
or more explicitly
palette.colors(8, palette =