R help - May 2006 - identify high dimension data point

Hi there, 
        I am having some trouble with the Identify() function,  it looks that
the identify() function only works on the plot of 2-dimension data set.  In
high-dimension case , if I use pairs() + identify() in hope to observe all the
components of the data point I selected, I get error message.  Is there anyway
to get around this ? Plus,  I also need it to actually compare all the
components of the picked data point with "mydataset" to choose the
closest one.
        Thanks million in advance. 

best

tong

The tkBrush function in the TeachingDemos package may help.  If you just
want to see where a selected point apears in each of the pairwise plots
based on selecting it in 1 plot then this function will do that for you
(note it depends on having installed the tcltk package as well).

If you need the index of a selected point then you can do something
like:

out1 <- tkBrush(mydata)
 
# now select the point of interest, click to make the change persistent.

which(out1$col != 'black')  # this gives the observation (row) number


Hope this helps,


-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at intermountainmail.org
(801) 408-8111
 

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Tong Wang
Sent: Wednesday, May 10, 2006 5:05 AM
To: R help
Subject: [R] identify high dimension data point

Hi there, 
        I am having some trouble with the Identify() function,  it looks
that the identify() function only works on the plot of 2-dimension data
set.  In high-dimension case , if I use pairs() + identify() in hope to
observe all the components of the data point I selected, I get error
message.  Is there anyway to get around this ? Plus,  I also need it to
actually compare all the components of the picked data point with
"mydataset" to choose the closest one. 
        Thanks million in advance. 

best

tong

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