It looks like we have a reliable solution to find a fractional part of a
floating point number, while maintaining the sign:
v
_2.375 _5.84615 _11.4 13.0028 13.0014 13 12.9986
fp=. * * 1|| NB. Thanks to Martin
fp v
_0.375 _0.846154 _0.4 0.0027933 0.00139082 0 0.998621
Credit should also go to the people who suggested the building blocks, e.g.
(1|y) Raul -- (1||y) Pascal -- (*y) Raul
It is also nice to have the companion verb - integer part:
ip=: * * <.@| NB. Thanks to Louis
ip v
_2 _5 _11 13 13 13 12
I have needed these functions more than once in my enginering work. I
believe that these two verbs need to be inserted somewhere in the "Numbers"
section of the J Phrases doc. Maybe under "8A-Numbers & Counting", or
8C-Representations", or "8D-Arithmetic".
How do we get them in the document? What section do they fit the best in?
Can I edit the Phrases doc?
Skip Cave
Cave Consulting LLC
>
>
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
