R help - Sep 2008 - brushing with parallel coordinates

Hello,

I have a multivariate data with a single Y variable and 9 X variables.
I tried drawing a parallel coordinates with the data set without a
problem, using lattice library. However, I want to do some brushing on
the graph. For example, I want to distinguish the group of data lines
of which Y values are bigger than 0.5. It could be through
coloring(red line, maybe).

Have a look at the brushing facility provided with another tool:

http://www.rebeccashapley.com/assignments/is247/images/xmdvbrush_.jpg

Can I do the job easily with lattice? Or should I change the tool?

You probably want either the ipcp function from the iplots package or the rggobi
package (along with the ggobi program).  Neither uses lattice, iplots uses java
and rggobi passes your data to the ggobi program which does a lot with
brushing/spinning/etc.

For general brushing there is also the tkBrush function in the TeachingDemos
package (but it only does scatterplot matricies) or the tkexamp function in the
same package that makes creating custom dynamic plots easier (use a tk control
to change arguments which could include a threshold for changing color).

Hope this helps,

________________________________________
From: r-help-bounces at r-project.org [r-help-bounces at r-project.org] On
Behalf Of June Kim [juneaftn at gmail.com]
Sent: Saturday, September 13, 2008 1:37 AM
To: r-help at r-project.org
Subject: [R] brushing with parallel coordinates

Hello,

I have a multivariate data with a single Y variable and 9 X variables.
I tried drawing a parallel coordinates with the data set without a
problem, using lattice library. However, I want to do some brushing on
the graph. For example, I want to distinguish the group of data lines
of which Y values are bigger than 0.5. It could be through
coloring(red line, maybe).

Have a look at the brushing facility provided with another tool:

http://www.rebeccashapley.com/assignments/is247/images/xmdvbrush_.jpg

Can I do the job easily with lattice? Or should I change the tool?

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On 9/13/08, June Kim <juneaftn at gmail.com>
wrote:
> Hello,
>
>  I have a multivariate data with a single Y variable and 9 X variables.
>  I tried drawing a parallel coordinates with the data set without a
>  problem, using lattice library. However, I want to do some brushing on
>  the graph. For example, I want to distinguish the group of data lines
>  of which Y values are bigger than 0.5. It could be through
>  coloring(red line, maybe).
Lattice is not a good tool for interactive brushing. For
non-interactive grouping, you could do

parallel(iris[1:4], groups = iris$Species, horizontal.axis = FALSE)
parallel(iris[1:4], groups = (iris$Sepal.Width < 3), horizontal.axis = FALSE)

etc.

-Deepayan