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filter_functions
2009 Feb 11
3
Filter a big matrix
Hi,
I have a big matrix X with M rows and N columns that I want to filter
it into smaller ones with m (<M) rows and N columns.
The filter rule is based on the values of each columns, i.e.
X looks like this:
column name: a, b, c, d, ... etc
a b c d ...
1 2 3 4 ...
5 6 7 8 ...
9 8 7 6 ...
... ... ... ...
The filter rule with the result that I want is: