diracz(n : number) 🡒 zedfunc, pure function
Returns a zedfunc with a zero value everywhere, except on
n where the value is 1. The function fails if a fractional number is passed as argument.
table T = with [| as N |] [| -1 |] [| 0 |] [| 1 |] [| 2 |] show table "" a1c4 with T.N diracz(T.N)