A 2 3 4 3 4 5 4 5 6 $A 3 3 ;/@$ A ┌─┬─┐ │3│3│ └─┴─┘ ;&i./@$ A ┌─────┬─────┐ │0 1 2│0 1 2│ └─────┴─────┘ 0 1 2 >:/ 0 1 2 1 0 0 1 1 0 1 1 1 A * 0 1 2 >:/ 0 1 2 2 0 0 3 4 0 4 5 6
Does this help? -- Raul On Thu, Oct 13, 2011 at 9:48 AM, David Vaughan <[email protected]> wrote: > How does that work? Using fndisplay, it suggests that it's equivalent to > > (* $) A > > On 13 Oct 2011, at 13:56, Raul Miller wrote: > >> On Thu, Oct 13, 2011 at 8:52 AM, David Vaughan >> <[email protected]> wrote: >>> I have an array like: >>> >>> 2 3 4 >>> 3 4 5 >>> 4 5 6 >>> >>> but I want to delete the upper right corner like so: >>> >>> 2 0 0 >>> 3 4 0 >>> 4 5 6 >> >> A=:+/~1+i.3 >> (* >:/&i./@$) A >> 2 0 0 >> 3 4 0 >> 4 5 6 >> >> -- >> Raul >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
