Transforming Clusters into a Color Map

[Lemniscate]

Thanks a bunch, I am working on it right now.  Actually, though, I was
wondering if I could ask you another question.  The kind of heatmap I
want is a bit different than the screenshot.  It is more like a
patchgrid (if you go to
http://www.cs.uml.edu/~mtrutsch/research/High-Dimensional_Visualizations-KDD2001-color.pdf
and go to section 3.3, you'll see a definition (and example) of a heat
maps, in the way I am using the word.  It's more like a spreadsheet
with colors instead of numbers.  I don't know if that makes it easier
or harder.  I'm sorry if I seem a bit dense on the subject but I have,
thus far, only used programs as ways in which to process data, not
actually display it in such a format.  I would think it would be
simple, but I know that I have a ton to learn, so it could be simple
or very complex.  Thanks a bunch,

Lem


Tim Churches <tchur at optushome.com.au> wrote in message news:<mailman.1022712528.1085.python-list at python.org>...
> Lemniscate wrote:
> > 
> > Hi all,
> > 
> > I have recently been asked to write a program that will operate on
> > huge arrays of numbers.  As such, I have quickly immersed myself in
> > Numeric.  Things are going well (Numeric, in my experience, is
> > extremely effective and relatively easy to learn).
> > 
> > However, I've been informed that I need to 'color map hotspots' in the
> > results.  For example, my boss wants me to transform the results (of,
> > for example, standard deviations run across each array) and then
> > cluster them by color (I can explain more if anybody needs it).
> > 
> > There are a few programs that do this but they all have propriety
> > formatting of the results (which precludes some of the things we want
> > to do) and limits onto the types of comparisons that can be done.
> > Ideally, we would want our own implementation that we could use in any
> > way we wanted.
> > 
> > There isn't alot of support for this type of programming at my
> > company, so the hope is that I can get a 'minimally' functional
> > prototype so we can see what can be done.
> > 
> > >From the people I've talked with, color-maps like these are actually
> > fairly common, so I was hoping that somebody could point me in the
> > right direction (maybe a module already exists to do this that
> > interfaces with Numeric, etc.)  I'm doing some searches but I'm not
> > having a whole lot of luck (right now, I am going through stuff like
> > "Numeric Color" etc.  Thanks a bunch.
> 
> Take a look at the R package - see http://www.r-project.org
> in particular the screenshots page - there is a nice "heat map" of
> a volcano at the bottom of the page. 
> 
> You can transfer your data to R via delimited text files, but if you 
> are using Unix or Linux, then have a look at Walter Moreira's RPy module
> (see http://rpy.sourceforge.net ) which embeds R in Python and allows
> NumPy arrays and other Python data structures to be transparently
> transferred into the R environment (and acted upon there).
> 
> Tim C