I have a table of 33291 rows. When i try to plot the graph with gradient
colour using "colorRampPalette" command but the out put graph is
colourless
or in black colour.But when i try the same command with small values it is
working why it so?
Color <- colorRampPalette(c("red","blue"))
plot(x,y,col=Color(33292))
--
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Your example is not reproducible. You pass 33292 colors to plot, but never
specify how to use them so only the first color (red) is used. If it worked with
a smaller number of colors, you were using something other than the default plot
function. If it works with a smaller number of colors, but not more, you may
have overloaded the plot device.
-------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77840-4352
-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of sreenath
Sent: Monday, June 1, 2015 6:12 AM
To: r-help at r-project.org
Subject: [R] Colour gradient is not working.
I have a table of 33291 rows. When i try to plot the graph with gradient
colour using "colorRampPalette" command but the out put graph is
colourless
or in black colour.But when i try the same command with small values it is
working why it so?
Color <- colorRampPalette(c("red","blue"))
plot(x,y,col=Color(33292))
--
View this message in context:
http://r.789695.n4.nabble.com/Colour-gradient-is-not-working-tp4708000.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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.
1. Don't use Nabble for the r-help mailing list.
2. Read the posting guide, and read http://adv-r.had.co.nz/Reproducibility.html
3. The following code works for me. Your error is not due to requesting too many
colours...
n <- 100000
x <- rnorm(n)
y <- rnorm(n)
myPalette <- colorRampPalette(c("red", "blue"))
plot(x, y, pch = ".", col = myPalette(n))
... although (obviously) most of the 100,000 colour values are the same:
R > length(unique(myPalette(n)))
[1] 259
B.
On Jun 1, 2015, at 10:37 AM, David L Carlson <dcarlson at tamu.edu> wrote:
> Your example is not reproducible. You pass 33292 colors to plot, but never
specify how to use them so only the first color (red) is used. If it worked with
a smaller number of colors, you were using something other than the default plot
function. If it works with a smaller number of colors, but not more, you may
have overloaded the plot device.
>
> -------------------------------------
> David L Carlson
> Department of Anthropology
> Texas A&M University
> College Station, TX 77840-4352
>
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of sreenath
> Sent: Monday, June 1, 2015 6:12 AM
> To: r-help at r-project.org
> Subject: [R] Colour gradient is not working.
>
> I have a table of 33291 rows. When i try to plot the graph with gradient
> colour using "colorRampPalette" command but the out put graph is
colourless
> or in black colour.But when i try the same command with small values it is
> working why it so?
>
> Color <- colorRampPalette(c("red","blue"))
>
> plot(x,y,col=Color(33292))
>
>
>
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/Colour-gradient-is-not-working-tp4708000.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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 r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
Try this plot(1:33292, 1:33292,col=Color(33292)) and then decide again whether or not it is working. -Don -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 On 6/1/15, 4:12 AM, "sreenath" <sreenath.rajur at macfast.ac.in> wrote:>I have a table of 33291 rows. When i try to plot the graph with gradient >colour using "colorRampPalette" command but the out put graph is >colourless >or in black colour.But when i try the same command with small values it is >working why it so? > >Color <- colorRampPalette(c("red","blue")) > >plot(x,y,col=Color(33292)) > > > > >-- >View this message in context: >http://r.789695.n4.nabble.com/Colour-gradient-is-not-working-tp4708000.htm >l >Sent from the R help mailing list archive at Nabble.com. > >______________________________________________ >R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >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.
sir i done this plot(1:33292, 1:33292,col=Color(33292)) command then it gives the coloured line but again it is not working in my data why? -- View this message in context: http://r.789695.n4.nabble.com/Colour-gradient-is-not-working-tp4708000p4708036.html Sent from the R help mailing list archive at Nabble.com.
How can i use colour gradient according to y axis if the y values not increasing gradualy -- View this message in context: http://r.789695.n4.nabble.com/Colour-gradient-is-not-working-tp4708000p4708595.html Sent from the R help mailing list archive at Nabble.com.
1. Don't ignore previous advice On Jun 1, 2015, at 10:59 AM, Boris Steipe <boris.steipe at utoronto.ca> wrote:> 1. Don't use Nabble for the r-help mailing list. > > 2. Read the posting guide, and read http://adv-r.had.co.nz/Reproducibility.html >2. Map your values to a range of integers that you can use as indices of your colour vector. The rank() function may be useful for this. However this is probably a bad idea from an information design point of view: it is likely that the resulting plot is misleading by presenting a continuity in colour where there is a discontinuity in values. B. PS. Seriously: don't ignore previous advice. I will not respond to further questions if you do. On Jun 13, 2015, at 1:09 AM, sreenath <sreenath.rajur at macfast.ac.in> wrote:> How can i use colour gradient according to y axis if the y values not > increasing gradualy > > > > -- > View this message in context: http://r.789695.n4.nabble.com/Colour-gradient-is-not-working-tp4708000p4708595.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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.