
Ublas : 
From: Neal Becker (ndbecker2_at_[hidden])
Date: 20070308 16:58:45
I'm wondering if it would be reasonable to try to use expression templates
for some conversions between complex and various real representations.
As an example, consider the case where I have a vector of real, and I want
to interpret this as complex:
c[n] = a[2n]+ i a[2n+1]
vector_unary doesn't appear to handle this, because
// Element access
BOOST_UBLAS_INLINE
const_reference operator () (size_type i) const {
return functor_type::apply (e_ (i));
}
doesn't feed the index 'i' to the functor.
So, my question is, would this be a reasonable thing to attempt, and what
would be the basic approach? (Assume this is one example of a related set.
Other related members would be:
* convert a pair of real vectors to complex
* convert a real vector to complex, mapping
c[n] = a[n]
Actually, we can already do that, I think.