What does return. Mean?
Also:
a=:*
b=:i:5
c=:i.3
d=:(<c),<b
c */b
0 0 0 0 0 0 0 0 0 0 0
_5 _4 _3 _2 _1 0 1 2 3 4 5
_10 _8 _6 _4 _2 0 2 4 6 8 10
(>{.d)
0 1 2
>}.d
_5 _4 _3 _2 _1 0 1 2 3 4 5
(>{.d) */ >}.d
0 0 0 0 0 0 0 0 0 0 0
_5 _4 _3 _2 _1 0 1 2 3 4 5
_10 _8 _6 _4 _2 0 2 4 6 8 10
$ (>{.d) */ >}.d
3 1 11
So:
(>{.d) */, >}.d
0 0 0 0 0 0 0 0 0 0 0
_5 _4 _3 _2 _1 0 1 2 3 4 5
_10 _8 _6 _4 _2 0 2 4 6 8 10
Why is ({.c) a list and (}.d) a table?
Linda
-----Original Message---
From: [email protected]
[mailto:[email protected]] On Behalf Of Raul Miller
Sent: Thursday, November 07, 2013 10:07 AM
To: Programming forum
Subje.ct: Re: [Jprogramming] Times Table Therapy
We can replace
g=: 1 :',.(":u),":,.>{.y'
with
g=: 1 :',.(":5!:5<''u''),":,.>{.y'
A problem is that u is a verb in your example, and you want a noun
representation of it.
But this runs into a problem:
g=: 1 :',.(":5!:5<''u''),":,.>{.y'
* g (<i.3),<i.5
|value error: y
| ,.(":5!:5<'u'),":,.>{. y
We need an unquoted reference to u (or one of the other such names), or x and y
are interpreted to mean u and v.
So:
g=: 1 :',.(":5!:5<''u''),":,.>{.y return. u'
* g (<i.3),<i.5
*
0
1
2
Does this make sense?
--
Raul
On Wed, Nov 6, 2013 at 11:07 PM, Linda Alvord <[email protected]>wrote:
> This the data I want to use:
>
> a=:*
> b=:i:5
> c=:i.3
> ]d=:(<c),<b
> ┌─────┬──────────────────────────┐
> │0 1 2│_5 _4 _3 _2 _1 0 1 2 3 4 5│
> └─────┴──────────────────────────┘
>
> This this is the correct result with the wrong data:
>
> a=:'*'
> f=: 1 :',.(":u),":,.>{.y'
> a f d
> *
> 0
> 1
> 2
>
> Here is the error I can’t fix:
> a=:*
> g=: 1 :',.(":u),":,.>{.y'
> a g d
> |domain error: a
> | ,. (":u),":,.>{.y
>
>
> Is there a way to make g work correctly?
>
> Linda
>
>
> -----Original Message-----
> From: [email protected] [mailto:
> [email protected]] On Behalf Of Roger Hui
> Sent: Sunday, November 03, 2013 7:02 PM
> To: Programming forum
> Subject: Re: [Jprogramming] Times Table Therapy
>
> > My first adverb! Linda
>
> Given the topic and the person, it seems appropriate to point out that Ken
> Iverson credited Linda Alvord for getting over a pedagogic hurdle.
> From *Kenneth
> E. Iverson <http://www.jsoftware.com/papers/autobio.htm>*, 2008, section
> 5:
>
> There were also surprises in the writing. Although the great utility of
> matrices was recognized (as in a 3-by-2 to represent a triangle), there was
> a great reluctance to use them because the concept was considered to be too
> difficult.
>
> Linda Alvord said to introduce the matrix as an outer product — an idea
> that the rest of us thought outrageous, until Linda pointed out that the
> kids already knew the idea from familiar addition and multiplication tables.
>
>
>
>
> On Sun, Nov 3, 2013 at 7:04 AM, Linda Alvord <[email protected]
> >wrote:
>
> >
> > My first adverb! Linda
> >
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