2007-12-06
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What is manifold learning? I know I spoke with Carolina about it but do not
remember what we came up with.

Is this a preprocessing step for dimension reduction?

What is Stemming?

Is the pancreatic cancer patient data dense or sparse?
Sparse because there are so few instances with common values, 
a characteristic of many attributes and few instances overall.

Paper mentions a gene expression dataset but no results are presented,
nor is further mention of it made.