Started looking at fold — seems a very useful new verb. However couldn’t get it to work
Engine: j901/j64avx2/darwin Release-e: commercial/2020-01-29T12:41:32 Library: 9.01.21 Qt IDE: 1.8.6/5.12.7(5.12.7) Platform: Darwin 64 Installer: J901 install InstallPath: /applications/j901 Here is the what happens when I run the example from the vocabulary u 3 : 0 z=. -y z [smoutput ' u' ; y ; '-->' ; z ) v 4 : 0 z=. y + 0.01 z [smoutput x ; 'v' ; y ; '-->' ; z ) y 100 0.1 1.1 2.1 3.1 u F:.v y |domain error | u F:.v y Any help much appreciated. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
