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Blitz Support : |
From: Todd Veldhuizen (tveldhui_at_[hidden])
Date: 2003-07-21 07:53:11
Hmm. Maybe you can use the (undocument) method
Array<T,N>::constructSlice. It handles up to 11 dimensions, and every
argument can be either an integer or a Range:
template<class P_numtype, int N_rank> template<int N_rank2, class R0,
class R1, class R2, class R3, class R4, class R5, class R6, class R7,
class R8, class R9, class R10>
void Array<P_numtype, N_rank>::constructSlice(Array<T_numtype, N_rank2>&
array,
R0 r0, R1 r1, R2 r2, R3 r3, R4 r4, R5 r5, R6 r6, R7 r7, R8 r8, R9 r9,
R10 r10);
See blitz/array/slicing.cc for details. If you call it with a
3-dimensional array, all the parameters for dimensions 4, 5, etc.
are ignored.
Cheers,
Todd
-- Todd Veldhuizen / tveldhui_at_[hidden] / Indiana University Computer Science On Sun, 20 Jul 2003, Dalal, Navneet wrote: > Thanks Todd, > > but as I want to write meta programmes, so this way of specifying slicing > will be different for different dimensions. > I am looking for dimension independent function or operator. > > thanks > navneet > > > -----Original Message----- > > From: Todd Veldhuizen [mailto:tveldhui_at_[hidden]] > > Sent: Sunday, July 20, 2003 1:14 PM > > To: Support list for Blitz++ > > Subject: Re: [Blitz-support] Sub arrays in blitz meta programming > > > > > > Hi Navneet, > > > > Try simply > > > > Array<double,1> b = a(5, Range::all()); > > > > See the slicing section of the manual for more detail: > > http://www.oonumerics.org/blitz/manual/blitz02.html#index00087 > > > > Cheers, > > Todd > > -- > > Todd Veldhuizen / tveldhui_at_[hidden] / Indiana University > > Computer Science > > > > On Thu, 17 Jul 2003, Dalal, Navneet wrote: > > > > > Hi, > > > > > > I am writing bilinear interpolation code using blitz > > arrays. I would like to > > > write this code for general N-d arrays using meta programming. > > > > > > However, I am stuck with one problem: how can I get a sub > > array along one > > > particular dimension for a blitz array ? > > > > > > What I need is something like this: > > > > > > Array<double, 2> a (10, 10); > > > // init a > > > > > > int index = 5; > > > int firstDimension = 0; > > > > > > Array<double,1> b = a.subarray(firstDimension, index); > > > > > > // now b points to a(5, range::all) > > > > > > > > > > > > Is there a function or operator already overloaded for this purpose? > > > > > > thanks > > > navneet > > > _______________________________________________ > > > Blitz-support mailing list > > > Blitz-support_at_[hidden] > > > http://www.oonumerics.org/mailman/listinfo.cgi/blitz-support > > > > > _______________________________________________ > > Blitz-support mailing list > > Blitz-support_at_[hidden] > > http://www.oonumerics.org/mailman/listinfo.cgi/blitz-support > > > _______________________________________________ > Blitz-support mailing list > Blitz-support_at_[hidden] > http://www.oonumerics.org/mailman/listinfo.cgi/blitz-support >