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diff liboctave/boolNDArray.cc @ 8756:d0755c9db5ed

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implement fast logical sum (counting)
author Jaroslav Hajek <highegg@gmail.com>
date Mon, 16 Feb 2009 12:41:55 +0100
parents 1bd918cfb6e2
children b756ce0002db
line wrap: on
line diff
--- a/liboctave/boolNDArray.cc
+++ b/liboctave/boolNDArray.cc
@@ -57,10 +57,11 @@
   return do_mx_red_op<boolNDArray> (*this, dim, mx_inline_any);
 }
 
-boolNDArray 
+NDArray 
 boolNDArray::sum (int dim) const
 {
-  MX_ND_REDUCTION (retval(result_idx) |= elem (iter_idx), true, boolNDArray);
+  // NOTE: going via octave_idx_type is faster even though it requires a conversion.
+  return do_mx_red_op<Array<octave_idx_type> > (*this, dim, mx_inline_count);
 }
 
 boolNDArray