Thanks Louis,
cartesian product does the trick,
Jimmy
On Sat, Nov 23, 2019 at 8:33 PM Louis de Forcrand <ol...@bluewin.ch> wrote:
> I believe that as Devon said the subarray selected by m in x m} y must not
> contain any fill elements, which isn't the case of your example as in its
> case the first element of m specifies a length 4 vector while the other two
> elements specify length 2 vectors. This leads to a 2 by 2 matrix of fills
> (spaces) visible (or not) in m{y.
>
> Another workaround is to manually specify all locations individually
> (which isn't too much work):
>
> n=: 5 8$'O'
> i=: (<0;0 1 2 3),(<1;2 3),<2 4;5
> ]j=: ; {&.> i
> +---+---+---+---+---+---+---+---+
> |0 0|0 1|0 2|0 3|1 2|1 3|2 5|4 5|
> +---+---+---+---+---+---+---+---+
> '=' j} n
> ====OOOO
> OO==OOOO
> OOOOO=OO
> OOOOOOOO
> OOOOO=OO
>
> Cheers,
> Louis
>
> > On 23 Nov 2019, at 20:35, Devon McCormick <devon...@gmail.com> wrote:
> >
> > Not sure why but it seems to have to do with length compatibility of the
> > indexes:
> >
> > '='((<0; 0 1 2 3),(<1; 2 3),< 2 4 ; 5)}n
> > |domain error
> > | '=' ((<0;0 1 2 3),(<1;2 3),<2 4;5)}n
> >
> > but
> >
> > '='((<0; 0 1 2 3),(<1;2 2 2 3),< 2 2 2 4 ; 5)}n
> > ====OOOO
> > OO==OOOO
> > OOOOO=OO
> > OOOOOOOO
> > OOOOO=OO
> >
> > and
> >
> > (0,&.>0 1 2 3),(1,&.>2 3),2 4,&.>5
> > +---+---+---+---+---+---+---+---+
> > |0 0|0 1|0 2|0 3|1 2|1 3|2 5|4 5|
> > +---+---+---+---+---+---+---+---+
> > '=' ((0,&.>0 1 2 3),(1,&.>2 3),2 4,&.>5) } n
> > ====OOOO
> > OO==OOOO
> > OOOOO=OO
> > OOOOOOOO
> > OOOOO=OO
> >
> >
> >
> >> On Sat, Nov 23, 2019 at 2:19 PM Jimmy Gauvin <jimmy.gau...@gmail.com>
> wrote:
> >>
> >> Hi,
> >>
> >> is there any way of making this kind of assignment ?
> >>
> >> '='((<0; 0 1 2 3),(<1; 2 3),< 2 4 ; 5)}n
> >> |domain error
> >> | '=' ((<0;0 1 2 3),(<1;2 3),<2 4;5)}n
> >>
> >> But this works :
> >> '='((<1; 2 3),< 2 4 ; 5)}n
> >> OOOOOOOO
> >> OO==OOOO
> >> OOOOO=OO
> >> OOOOOOOO
> >> OOOOO=OO
> >>
> >> and so does :
> >>
> >> ((<0; 0 1 2 3),(<1; 2 3),< 2 4 ; 5){n
> >>
> >> OOOO
> >>
> >> OO
> >>
> >> OO
> >>
> >>
> >>
> >> Thanks
> >> ----------------------------------------------------------------------
> >> For information about J forums see http://www.jsoftware.com/forums.htm
> >>
> >
> >
> > --
> >
> > Devon McCormick, CFA
> >
> > Quantitative Consultant
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
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