Length error results when, instead of the usual Times in dot product, I
use Signum@Times or Signum@:Times. On the other hand, when I use the
equivalent of dot product u@(v"(1+lv,_)) no length error occurs.
Below is a short session demonstrating my experiments.
What am I missing?
Thanks,
JVERSION
Engine: j807/j64/darwin
Release-c: commercial/2019-02-24T10:50:40
Library: 8.07.22
Platform: Darwin 64
Installer: J807 install
InstallPath: /users/brian/j64-807
Contact: www.jsoftware.com
(i. 3 4 ) +/ . * i. 4 5
70 76 82 88 94
190 212 234 256 278
310 348 386 424 462
(i. 3 4 ) +/ . *@:* i. 4 5
|length error
| (i.3 4) +/ .*@:*i.4 5
(i. 3 4)+/@(*"(1+0,_)) i. 4 5
70 76 82 88 94
190 212 234 256 278
310 348 386 424 462
(i. 3 4)+/@(*@*"(1+0,_)) i. 4 5
3 3 3 3 3
3 4 4 4 4
3 4 4 4 4
--
(B=)
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