Re: Support for more general ranges
Nasos Iliopoulos <[email protected]>
| Newsgroups | gmane.comp.lib.boost.ublas |
|---|---|
| Message-ID | <[email protected]> |
You can add a ticket here: https://svn.boost.org/trac/boost/newticket under "feature requests" Link to this discussion through gmane (http://article.gmane.org/gmane.comp.lib.boost.ublas/6978) and (http://article.gmane.org/gmane.comp.lib.boost.ublas/5468) Best, -Nasos On 06/03/2013 12:14 PM, gsermaid wrote: > Naso, > Thanks for your prompt reply. It would be great to see this > integrated. Do I need to do something in order to mark it as a feature > request? > > Giorgos > > ---------------------------------------------------------------------- > > Message: 2 > Date: Mon, 3 Jun 2013 11:04:40 -0400 > From: Nasos Iliopoulos <[email protected] <mailto:[email protected]>> > To: [email protected] <mailto:[email protected]> > Subject: Re: [ublas] Support for more general ranges > Message-ID: <[email protected] > <mailto:[email protected]>> > Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" > > Giorgo, > this will probably help you: > http://boost.2283326.n4.nabble.com/indirect-array-strikes-back-td2711579.html > > I don't recall this functionality being integrated though. We should > probably mark this as a feature request. > > -Nasos > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 3 Jun 2013 15:10:46 +0100 (BST) > From: gsermaid <[email protected] <mailto:[email protected]>> > To: "[email protected] <mailto:[email protected]>" > <[email protected] <mailto:[email protected]>> > Subject: Re: [ublas] Support for more general ranges > Message-ID: > <[email protected] > <mailto:[email protected]>> > Content-Type: text/plain; charset="iso-8859-1" > > Hello again, > > Further to the recommendation by?oswin krause for trying out > vector_indirect, I would like to ask the following. > The documentation > (http://www.boost.org/doc/libs/1_53_0/libs/numeric/ublas/doc/html/classboost_1_1numeric_1_1ublas_1_1vector__indirect.html#_details) > states that a vector_indirect can be constructed by a broad range of > vectors of indices, such as? > std::vector, ublas::vector or indirect_array.? > > The problem is I seem to be able to construct an indirect vector using > indirect_array types _only_. When for example I use a > ublas::vector<size_t> or a std::vector<size_t> as a vector of indices > I get a compilation error from gcc 4.7.2 that there is a preprocess > member missing. > > Is the documentation simply out of date and only the use of > indirect_arrays is allowed, or is it a bug? Thanks in advance. > > Regards, > Giorgos > > > > ________________________________ > > > Message: 1 > Date: Mon, 20 May 2013 17:49:30 +0100 (BST) > From: gsermaid <[email protected] <mailto:[email protected]>> > To: "[email protected] <mailto:[email protected]>" > <[email protected] <mailto:[email protected]>> > Subject: [ublas] Support for more general ranges > Message-ID: > ??? <[email protected] > <mailto:[email protected]>> > Content-Type: text/plain; charset="iso-8859-1" > > Hi all, > > I would like to ask if there is any way to create a vector proxy based > on a general range of indices. For example, if I have > a vector > > vector<unsigned> x(4); > x <<= 1,2,3,4; > > and a vector of indices? > > vector<size_t> k(2); > k <<= 0,3; > > I would like to be able to create a vector proxy as follows > > vector_proxy<unsigned> mysubvector(x, k); > > with the property that > > mysubvector[i] = x[k[i]]. > > I know I can create a simple new class which provides this > functionality but ideally I also want to have > all the useful iterator functionality and mathematical operations > supported by a typical ublas vector. Is this currently supported? If > not, is there an easy way to? > implement it and have all the functionality that ublas offer? Finally, > do you think something like this could be included in future versions? > > Regards, > Giorgos > -------------- next part -------------- > HTML attachment scrubbed and removed > > ------------------------------ > > Message: 2 > Date: 20 May 2013 18:51:54 +0200 > From: "oswin krause" <[email protected] > <mailto:[email protected]>> > To: [email protected] <mailto:[email protected]> > Subject: Re: [ublas] Support for more general ranges > Message-ID: <[email protected] > <mailto:[email protected]>> > Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" > > Hi, > > take a look at vector_indirect. > > On 20.05.2013 18:49, gsermaid wrote: > > Hi all, > > > > I would like to ask if there is any way to create a vector proxy based > > on a general range of indices. For example, if I have > > a vector > > > > vector<unsigned> x(4); > > x <<= 1,2,3,4; > > > > and a vector of indices > > > > vector<size_t> k(2); > > k <<= 0,3; > > > > I would like to be able to create a vector proxy as follows > > > > vector_proxy<unsigned> mysubvector(x, k); > > > > with the property that > > > > mysubvector[i] = x[k[i]]. > > > > I know I can create a simple new class which provides this > > functionality but ideally I also want to have > > all the useful iterator functionality and mathematical operations > > supported by a typical ublas vector. Is this currently supported? If > > not, is there an easy way to > > implement it and have all the functionality that ublas offer? Finally, > > do you think something like this could be included in future versions? > > > > Regards, > > Giorgos > > > > > > _______________________________________________ > > ublas mailing list > > [email protected] <mailto:[email protected]> > > http://lists.boost.org/mailman/listinfo.cgi/ublas > > Sent to: [email protected] > <mailto:[email protected]> > > -------------- next part -------------- > HTML attachment scrubbed and removed > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > ublas mailing list > [email protected] <mailto:[email protected]> > http://lists.boost.org/mailman/listinfo.cgi/ublas > > > ------------------------------ > > End of ublas Digest, Vol 102, Issue 11 > ************************************** > -------------- next part -------------- > HTML attachment scrubbed and removed > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > ublas mailing list > [email protected] <mailto:[email protected]> > http://lists.boost.org/mailman/listinfo.cgi/ublas > > > ------------------------------ > > End of ublas Digest, Vol 102, Issue 12 > ************************************** > -------------- next part -------------- > HTML attachment scrubbed and removed > > ------------------------------ > > Message: 2 > Date: Mon, 3 Jun 2013 11:04:40 -0400 > From: Nasos Iliopoulos <[email protected] <mailto:[email protected]>> > To: [email protected] <mailto:[email protected]> > Subject: Re: [ublas] Support for more general ranges > Message-ID: <[email protected] > <mailto:[email protected]>> > Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" > > Giorgo, > this will probably help you: > http://boost.2283326.n4.nabble.com/indirect-array-strikes-back-td2711579.html > > I don't recall this functionality being integrated though. We should > probably mark this as a feature request. > > -Nasos > > > On 06/03/2013 10:10 AM, gsermaid wrote: > > Hello again, > > > > Further to the recommendation by oswin krause for trying out > > vector_indirect, I would like to ask the following. > > The documentation > > > (http://www.boost.org/doc/libs/1_53_0/libs/numeric/ublas/doc/html/classboost_1_1numeric_1_1ublas_1_1vector__indirect.html#_details) > > > states that a vector_indirect can be constructed by a broad range of > > vectors of indices, such as > > std::vector, ublas::vector or indirect_array. > > > > The problem is I seem to be able to construct an indirect vector using > > indirect_array types _only_. When for example I use a > > ublas::vector<size_t> or a std::vector<size_t> as a vector of indices > > I get a compilation error from gcc 4.7.2 that there is a preprocess > > member missing. > > > > Is the documentation simply out of date and only the use of > > indirect_arrays is allowed, or is it a bug? Thanks in advance. > > > > Regards, > > Giorgos > > > > > > ------------------------------------------------------------------------ > > > > Message: 1 > > Date: Mon, 20 May 2013 17:49:30 +0100 (BST) > > From: gsermaid <[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>>> > > To: "[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>>" > > <[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>>> > > Subject: [ublas] Support for more general ranges > > Message-ID: > > ??? <[email protected] > <mailto:[email protected]> > > <mailto:[email protected] > <mailto:[email protected]>>> > > Content-Type: text/plain; charset="iso-8859-1" > > > > Hi all, > > > > I would like to ask if there is any way to create a vector proxy based > > on a general range of indices. For example, if I have > > a vector > > > > vector<unsigned> x(4); > > x <<= 1,2,3,4; > > > > and a vector of indices? > > > > vector<size_t> k(2); > > k <<= 0,3; > > > > I would like to be able to create a vector proxy as follows > > > > vector_proxy<unsigned> mysubvector(x, k); > > > > with the property that > > > > mysubvector[i] = x[k[i]]. > > > > I know I can create a simple new class which provides this > > functionality but ideally I also want to have > > all the useful iterator functionality and mathematical operations > > supported by a typical ublas vector. Is this currently supported? If > > not, is there an easy way to? > > implement it and have all the functionality that ublas offer? Finally, > > do you think something like this could be included in future versions? > > > > Regards, > > Giorgos > > -------------- next part -------------- > > HTML attachment scrubbed and removed > > > > ------------------------------ > > > > Message: 2 > > Date: 20 May 2013 18:51:54 +0200 > > From: "oswin krause" <[email protected] > <mailto:[email protected]> > > <mailto:[email protected] > <mailto:[email protected]>>> > > To: [email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>> > > Subject: Re: [ublas] Support for more general ranges > > Message-ID: <[email protected] > <mailto:[email protected]> > > <mailto:[email protected] > <mailto:[email protected]>>> > > Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" > > > > Hi, > > > > take a look at vector_indirect. > > > > On 20.05.2013 18:49, gsermaid wrote: > > > Hi all, > > > > > > I would like to ask if there is any way to create a vector proxy based > > > on a general range of indices. For example, if I have > > > a vector > > > > > > vector<unsigned> x(4); > > > x <<= 1,2,3,4; > > > > > > and a vector of indices > > > > > > vector<size_t> k(2); > > > k <<= 0,3; > > > > > > I would like to be able to create a vector proxy as follows > > > > > > vector_proxy<unsigned> mysubvector(x, k); > > > > > > with the property that > > > > > > mysubvector[i] = x[k[i]]. > > > > > > I know I can create a simple new class which provides this > > > functionality but ideally I also want to have > > > all the useful iterator functionality and mathematical operations > > > supported by a typical ublas vector. Is this currently supported? If > > > not, is there an easy way to > > > implement it and have all the functionality that ublas offer? Finally, > > > do you think something like this could be included in future versions? > > > > > > Regards, > > > Giorgos > > > > > > > > > _______________________________________________ > > > ublas mailing list > > > [email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>> > > > http://lists.boost.org/mailman/listinfo.cgi/ublas > > > Sent to: [email protected] > <mailto:[email protected]> > > <mailto:[email protected] > <mailto:[email protected]>> > > > > -------------- next part -------------- > > HTML attachment scrubbed and removed > > > > ------------------------------ > > > > Subject: Digest Footer > > > > _______________________________________________ > > ublas mailing list > > [email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>> > > http://lists.boost.org/mailman/listinfo.cgi/ublas > > > > > > ------------------------------ > > > > End of ublas Digest, Vol 102, Issue 11 > > ************************************** > > -------------- next part -------------- > > HTML attachment scrubbed and removed > > > > ------------------------------ > > > > Subject: Digest Footer > > > > _______________________________________________ > > ublas mailing list > > [email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>> > > http://lists.boost.org/mailman/listinfo.cgi/ublas > > > > > > ------------------------------ > > > > End of ublas Digest, Vol 102, Issue 12 > > ************************************** > > > > > > > > > > _______________________________________________ > > ublas mailing list > > [email protected] <mailto:[email protected]> > > http://lists.boost.org/mailman/listinfo.cgi/ublas > > Sent to: [email protected] > <mailto:[email protected]> > > -------------- next part -------------- > HTML attachment scrubbed and removed > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > ublas mailing list > [email protected] <mailto:[email protected]> > http://lists.boost.org/mailman/listinfo.cgi/ublas > > > ------------------------------ > > End of ublas Digest, Vol 103, Issue 2 > ************************************* > > > > > _______________________________________________ > ublas mailing list > [email protected] > http://lists.boost.org/mailman/listinfo.cgi/ublas > Sent to: [email protected] _______________________________________________ ublas mailing list [email protected] http://lists.boost.org/mailman/listinfo.cgi/ublas Sent to: [email protected]