If at first you don't succeed ... Insert after row j :
m=: 10+i.5 3
j=: 1
((1+j){.m), 7 8 9, (1+j)}.m
10 11 12
13 14 15
7 8 9
16 17 18
19 20 21
22 23 24
(<0,1+i.1+j) C. 7 8 9,m
10 11 12
13 14 15
7 8 9
16 17 18
19 20 21
22 23 24
(7 8 9,m) /: (1+j),i.#m
10 11 12
13 14 15
7 8 9
16 17 18
19 20 21
22 23 24
----- Original Message -----
From: Roger Hui <[EMAIL PROTECTED]>
Date: Monday, April 28, 2008 22:52
Subject: Re: [Jprogramming] BegQ--row deletion/insertion
To: Programming forum <[email protected]>
> The last expression should be (<0,1+i.j) C. 7 8 9,m
> for inserting a row after row j :
>
> (<0,1+i.j) C. 7 8 9,m
> 10 11 12
> 7 8 9
> 13 14 15
> 16 17 18
> 19 20 21
> 22 23 24
>
>
>
> ----- Original Message -----
> From: Roger Hui <[EMAIL PROTECTED]>
> Date: Monday, April 28, 2008 21:12
> Subject: Re: [Jprogramming] BegQ--row deletion/insertion
> To: Programming forum <[email protected]>
>
> > ] m=: 10+i.5 3
> > 10 11 12
> > 13 14 15
> > 16 17 18
> > 19 20 21
> > 22 23 24
> > ] j=: ?. #m
> > 1
> > NB. delete row j
> > (j~:i.#m)#m
> > 10 11 12
> > 16 17 18
> > 19 20 21
> > 22 23 24
> >
> > NB. insert after row j
> > (j{.m),7 8 9,j}.m
> > 10 11 12
> > 7 8 9
> > 13 14 15
> > 16 17 18
> > 19 20 21
> > 22 23 24
> > (<j,_1) C. m,7 8 9
> > 10 11 12
> > 7 8 9
> > 16 17 18
> > 19 20 21
> > 22 23 24
> > 13 14 15
> >
> >
> >
> > ----- Original Message -----
> > From: PackRat <[EMAIL PROTECTED]>
> > Date: Monday, April 28, 2008 20:12
> > Subject: [Jprogramming] BegQ--row deletion/insertion
> > To: Programming forum <[email protected]>
> >
> > > My brain must have gone into hibernation or something for
> the
> > > past
> > > couple of hours: no matter how much I've searched the
> > > documentation and
> > > the forum archives, I cannot seem to find anything about
> > > deleting a row
> > > from an array or inserting a row into an array. I was
> > > thinking that,
> > > instead of dropping sequential items from the beginning or
> end
> > > (as with
> > > "drop"), deleting would likely be along the line of a
> selected
> > > list of
> > > one or more items (such as rows) to drop. (I suppose
> > > inserting would
> > > be analogous in some manner.) However, try as I might,
> I
> > > couldn't find
> > > anything that would seem to be so simple, maybe even a
> > primitive
> > > (and
> > > probably so obvious!)--hence, my frustration with
> > myself.
> > > Could some
> > > kind soul gently share how these would be done? Thanks
> > in
> > > advance!
> > > Harvey
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