Hi,
in the Volute article at page 88 there is, I suppose, a small error
QT=: [ ,"2 |.@|:@]
Wd=: [`(((#...@[{.]) QT [) Wd #...@[}.])@.(0:<#...@])
Sp=: (i. @ ((-/ @ ]) , 0:)) W i.@(*/)@]
evKS=: (i.@(0:,0:)) Wd i...@*:@]The verb Sp is calling an undefined W I think it should be Sp=: (i. @ ((-/ @ ]) , 0:)) Wd i.@(*/)@] MfG Luca ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
