Add python api to slice columns in DMatrix #9620
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If we were to focus on in-memory inputs, can we slice the input directly? I really want to keep the DMatrix as simple as possible. |
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Yeah I think we can try to slice the scipy matrix directly, but probably need better support for the in-memory types first. Will work on that. |
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Expose the C++
DMatrix.SliceCol()method in Python, mostly for testing purposes.