What is the purpose of this exercise?
Finally, Kim broke it down to what appears to be the unstated initial
problem and expressed it succinctly.
it appears to be that what was wanted is the negative of the magnitude
of a complex number. (or x,y values). That is -^.| xjy or ^.% |xjy (- is
better).
Using j./ is great but what if you want several pairs such as
(1,1),(2,1), (1, 2),(3,4)?There is a problems. This works with the x and
y values in columns.
x=:4 1$1 2 1 3
y=: 4 1$1 1 2 4
-^.| x j. y
_0.346574
_0.804719
_0.804719
_1.60944
However why not express x and y values in the form xjy
1j1 2j1 2j2 3j4 which may be more easily entered.
-^.| 1j1 2j1 1j2 3j4
_0.346574 _0.804719 _0.804719 _1.60944
^ -^.| 1j1 2j1 1j2 3j4
0.707107 0.447214 0.447214 0.2
%| 1j1 2j1 1j2 3j4
0.707107 0.447214 0.447214 0.2 checks
Don Kelly
On 10/12/2013 10:40 AM, km wrote:
- ^. | j./ 1 1
_0.346574
--Kip Murray
Sent from my iPad
On Dec 10, 2013, at 9:03 AM, Marshall Lochbaum <[email protected]> wrote:
-@^.@|@j./"1 does the trick.
You can also use (+/&.:*:) in place of |@j./ , leaving you with
-@^.@(+/&.:*:)"1
.
Marshall
On Tue, Dec 10, 2013 at 09:55:22AM -0500, Raul Miller wrote:
Is there a better way of doing this?
{: +. r.inv j./1 1
_0.346574
Assume 1 1 can be replaced with any reasonable coordinate pair.
I'm looking for either conciseness or clarity (ideally both, but
mostly I want some good options).
Thanks,
--
Raul
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