Support codings with "implicit intercept"#107
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vnavkal wants to merge 2 commits into
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Support codings with "implicit intercept"#107vnavkal wants to merge 2 commits into
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matthewwardrop
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For some use cases, it would be nice to have patsy code a design matrix as if it were going to include an intercept (so e.g. it would exclude some categorical levels), but then not include the intercept. See #80 for details.
This pull request adds an
implicit_interceptparameter to some of the public functions (dmatrix,dmatrices,incr_dbuilder,incr_dbuilders, anddesign_matrix_builders). When set toTrue, it codes the matrix as if an intercept were included but doesn't actually include the intercept.