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}
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}
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SEXP dense_to_Csparse(SEXP x)
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SEXP dense_to_Csparse(SEXP x)
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{
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{
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    CHM_DN chxd = AS_CHM_DN(PROTECT(mMatrix_as_geMatrix(x)));
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    CHM_DN chxd = AS_CHM_DN(PROTECT(mMatrix_as_geMatrix(x)));
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    R_CheckStack();
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    /* cholmod_dense_to_sparse() in CHOLMOD/Core/ below does only work for
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    /* cholmod_dense_to_sparse() in CHOLMOD/Core/ below does only work for
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       "REAL" 'xtypes', i.e. *not* for "nMatrix".
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       "REAL" 'xtypes', i.e. *not* for "nMatrix".
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       ===> need "_x" in above call.
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       ===> need "_x" in above call.
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