Description Usage Arguments Value
Generating a new big.matrix.descriptor or doing sub.big.matrix on something that's not a descriptor is slow. This method exists to effectively create the descriptor that describe(new.sub.big.matrix) would do, but in a fraction of the time.
1 |
desc |
Existing big.matrix.descriptor |
first |
First relative row of that matrix |
last |
Last relative row of that matrix |
New descriptor
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