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Rory.WINSTON at rbs.com

2008-Nov-25 17:35 UTC

[R] Line color based on data values?

Hi all

Does anyone know if it is possible when plotting a line or scatter plot, to
selectively color the data points based on the data value? i.e. if plotting say
the percentage change in stock price movements, to color +ve points in green and
-ve points in red? And extending this to a user-defined range of colors based on
the quartile of the data points?

Thanks
Rory

Rory Winston
RBS Global Banking & Markets
280 Bishopsgate, London, EC2M 4RB
Office: +44 20 7085 4476



***********************************************************************************
The Royal Bank of Scotland plc. Registered in Scotland No 90312. Registered
Office: 36 St Andrew Square, Edinburgh EH2 2YB.
Authorised and regulated by the Financial Services Authority 

This e-mail message is confidential and for use by the=2...{{dropped:25}}

Greg Snow

2008-Nov-25 17:59 UTC

head link

[R] Line color based on data values?

Try this:

tmp <- with(iris, seq( min(Petal.Length)-1, max(Petal.Length)+1,
length.out=6))
with( iris, plot( Sepal.Width, Sepal.Length, col=topo.colors(5)[
cut(Petal.Length,tmp) ] ) )

hope this helps,

--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Rory.WINSTON at rbs.com
> Sent: Tuesday, November 25, 2008 10:35 AM
> To: r-help at r-project.org
> Subject: [R] Line color based on data values?
>
> Hi all
>
> Does anyone know if it is possible when plotting a line or scatter
> plot, to selectively color the data points based on the data value?
> i.e. if plotting say the percentage change in stock price movements, to
> color +ve points in green and -ve points in red? And extending this to
> a user-defined range of colors based on the quartile of the data
> points?
>
> Thanks
> Rory
>
> Rory Winston
> RBS Global Banking & Markets
> 280 Bishopsgate, London, EC2M 4RB
> Office: +44 20 7085 4476
>
>
>
> ***********************************************************************
> ************
> The Royal Bank of Scotland plc. Registered in Scotland No 90312.
> Registered Office: 36 St Andrew Square, Edinburgh EH2 2YB.
> Authorised and regulated by the Financial Services Authority
>
> This e-mail message is confidential and for use by
> the=2...{{dropped:25}}
>
> ______________________________________________
> R-help at 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.

Daniel Malter

2008-Nov-25 18:03 UTC

head link

[R] Line color based on data values?

Hi,

for example:

today=rnorm(100)
yesterday=rnorm(100)
up=today[today>yesterday]
down=today[today<yesterday]
index.up=which(today>yesterday)
index.down=which(today<yesterday)

plot(up~yesterday[index.up],col="green",xlim=c(-5,5),ylim=c(-5,5))
points(down~yesterday[index.down],col="red")


today: today's returns
yesterday: yesterday's return
up: returns if returns today are greater than yesterday
down: return if returns are smaller than yesterday
(for pairs of observations)

index.up: index number of observations for which up==true
index.down: index number of obersvations for which down=true

plot: first plot today's returns against yesterday's returns
for stocks that are up only (adjust plotting limits of x and y axis so as
to accomodate the later plot of down stocks; plot ups in green)

points: plot today's return against yesterday's returns for stocks that
are
down only (plot in the same plot generated above; plot in red)

Cheers,
Daniel


-------------------------
cuncta stricte discussurus
-------------------------

-----Urspr?ngliche Nachricht-----
Von: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Im
Auftrag von Rory.WINSTON at rbs.com
Gesendet: Tuesday, November 25, 2008 12:35 PM
An: r-help at r-project.org
Betreff: [R] Line color based on data values?

Hi all

Does anyone know if it is possible when plotting a line or scatter plot, to
selectively color the data points based on the data value? i.e. if plotting
say the percentage change in stock price movements, to color +ve points in
green and -ve points in red? And extending this to a user-defined range of
colors based on the quartile of the data points?

Thanks
Rory

Rory Winston
RBS Global Banking & Markets
280 Bishopsgate, London, EC2M 4RB
Office: +44 20 7085 4476



****************************************************************************
*******
The Royal Bank of Scotland plc. Registered in Scotland No 90312. Registered
Office: 36 St Andrew Square, Edinburgh EH2 2YB. 
Authorised and regulated by the Financial Services Authority 

This e-mail message is confidential and for use by =\ th...{{dropped:10}}

Bert Gunter

2008-Nov-25 20:22 UTC

head link

[R] Line color based on data values?

FWIW

Indeed! And IMHO such a nice example of the power and beauty of the R
language.

-- Bert

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
Behalf Of Greg Snow
Sent: Tuesday, November 25, 2008 10:00 AM
To: Rory.WINSTON at rbs.com; r-help at r-project.org
Subject: Re: [R] Line color based on data values?

Try this:

tmp <- with(iris, seq( min(Petal.Length)-1, max(Petal.Length)+1,
length.out=6))
with( iris, plot( Sepal.Width, Sepal.Length, col=topo.colors(5)[
cut(Petal.Length,tmp) ] ) )

hope this helps,

--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Rory.WINSTON at rbs.com
> Sent: Tuesday, November 25, 2008 10:35 AM
> To: r-help at r-project.org
> Subject: [R] Line color based on data values?
>
> Hi all
>
> Does anyone know if it is possible when plotting a line or scatter
> plot, to selectively color the data points based on the data value?
> i.e. if plotting say the percentage change in stock price movements, to
> color +ve points in green and -ve points in red? And extending this to
> a user-defined range of colors based on the quartile of the data
> points?
>
> Thanks
> Rory
>
> Rory Winston
> RBS Global Banking & Markets
> 280 Bishopsgate, London, EC2M 4RB
> Office: +44 20 7085 4476
>
>
>
> ***********************************************************************
> ************
> The Royal Bank of Scotland plc. Registered in Scotland No 90312.
> Registered Office: 36 St Andrew Square, Edinburgh EH2 2YB.
> Authorised and regulated by the Financial Services Authority
>
> This e-mail message is confidential and for use by
> the=2...{{dropped:25}}
>
> ______________________________________________
> R-help at 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.
______________________________________________
R-help at 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.

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