[R] creating a color display matrix

davidr at rhotrading.com davidr at rhotrading.com
Wed Jul 26 22:31:24 CEST 2006


?image has worked for me.

David L. Reiner
Rho Trading Securities, LLC
Chicago  IL  60605
312-362-4963

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Kartik Pappu
Sent: Wednesday, July 26, 2006 3:30 PM
To: r-help at stat.math.ethz.ch
Subject: [R] creating a color display matrix

Hello all,

I am trying to use R to create a colored data matrix.  I have my data 
which (after certain steps of normalization and log transformation) 
gives me a "x by y" matrix of numbers between 0 and -5.  I want to be 
able to create from this matrix of numbers a "x by y" image (box) that 
contains x*y squares and somehow uses the value in the original matrix 
to come up with a color that corresponds to the number.  Hence each box 
will be colored on a scale between 0 and 5.  For example my data could 
look like this:

                 X1.FcH      X2.FcH      X3.FcH     X4.FcH      X5.FcH

  X6.FcH       X7.FcH
1-AP        0.09667593 -4.66298640 -1.28299697 -4.8739017 -4.95862831 
-5.178603 -4.878524750
2-AP       -4.69186869 -0.08547776 -4.56495440 -4.8348255 -4.80256152 
-5.121531 -4.894347108
3-AP       -1.71380667 -4.52626124 -0.06810053 -4.8703810 -4.65657593 
-5.024595 -4.824712621
4-AP       -4.47968850 -4.48604718 -4.44314403 -0.1569536 -4.86436977 
-4.988196 -4.550416356
5-AP       -4.64616469 -4.53888807 -4.78163386 -4.9162949 -0.01729274 
-5.061663 -0.769960777
6-AP       -4.61047573 -4.60917414 -4.72514817 -5.0084772 -4.87797740 
-0.284934 -1.782745357
7-AP       -4.48157167 -4.61850313 -4.72241281 -4.8694868 -1.66122821 
-3.887898 -0.002522157

How do I make a 7 x 7 box that has 49 squares and each square has a 
color in the RGB spectrum that corresponds to the value.  So for 
example in the matrix above the biggest number which is 0.00966 (at 
position 1 , 1) could be set to RED and the smallest number which is 
5.0084 (at position 6, 5) can be set to BLUE and all the other numbers 
be shades on a scale of Red going to Blue.

I hope this problem makes sense.  I am rather new to R and was 
wondering if there was a function or solution to this problem out 
there.

Thanks
Kartik


----------------------------------------------------------
IMPORTANT WARNING:  This email (and any attachments) is only intended
for the use of the person or entity to which it is addressed, and may
contain information that is privileged and confidential.  You, the
recipient, are obligated to maintain it in a safe, secure and
confidential manner.  Unauthorized redisclosure or failure to maintain
confidentiality may subject you to federal and state penalties. If you
are not the recipient, please immediately notify us by return email, and
delete this message from your computer.

______________________________________________
R-help at stat.math.ethz.ch 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.



More information about the R-help mailing list