Many thanks for the help. I'm looking to do a rolling contextual histogram as data arrives. This is like a poor man's data classifier.

For comparing 2 histograms, are there fast (there are Gb of lines) methods for doing intersect? xor? join?

In reply to Re^2: Contextual/categorical Histogram by f77coder
in thread Contextual/categorical Histogram by f77coder

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