I think this will finally work... It solves both problems.
h=: 13 :'((<:+/\x*#y)I.i.#y)</.y'
x=:0.5 0.25 0.25
y=:'ABCDEFGHIJKLMN'
x h i.14
┌─────────────┬─────┬───────────┐
│0 1 2 3 4 5 6│7 8 9│10 11 12 13│
└─────────────┴─────┴───────────┘
x h y
┌───────┬───┬────┐
│ABCDEFG│HIJ│KLMN│
└───────┴───┴────┘
x h i.19
┌─────────────────┬─────────────┬──────────────┐
│0 1 2 3 4 5 6 7 8│9 10 11 12 13│14 15 16 17 18│
└─────────────────┴─────────────┴──────────────┘
Linda
-----Original Message-----
From: Programming [mailto:[email protected]] On Behalf
Of Linda Alvord
Sent: Sunday, December 17, 2017 2:31 AM
To: [email protected]
Subject: Re: [Jprogramming] Splitting an Array into several arrays
My version g causes domain error,
is, but is group correct?
y=:'ABCDEFGHIJKLMN'
0.5 0.25 0.25 group y
┌────────┬───┬───┐
│ABCDEFGH│IJK│LMN│
└────────┴───┴───┘
So I tried this and it doesn't look good either.
0.5 0.25 0.25 group i.14
┌───────────────┬──────┬────────┐
│0 1 2 3 4 5 6 7│8 9 10│11 12 13│
└───────────────┴──────┴────────┘
Linda
-----Original Message-----
From: Programming [mailto:[email protected]] On Behalf
Of Ric Sherlock
Sent: Sunday, December 17, 2017 12:48 AM
To: Programming JForum <[email protected]>
Subject: Re: [Jprogramming] Splitting an Array into several arrays
Hi Raul,
You're right. Writing emails on a phone is not something that comes naturally
to me, so my responses tend to be pretty brief.
Cheers
Ric
On 16/12/2017 18:18, "Raul Miller" <[email protected]> wrote:
> When you say things like this, it's good to provide an example of what
> you're talking about.
>
> Perhaps:
>
> 0.35 0.3 0.3 group2 'ABCDEFGHIJKLMN'
> ┌─────┬─────┬────┐
> │ABCDE│FGHIJ│KLMN│
> └─────┴─────┴────┘
> 0.35 0.3 0.3 f 'ABCDEFGHIJKLMN'
> |domain error: f
>
> Thanks,
>
> --
> Raul
>
>
> On Sat, Dec 16, 2017 at 12:14 AM, Ric Sherlock <[email protected]> wrote:
> > Note that group2 and f are not equivalent.
> >
> > On 16/12/2017 00:05, "Linda Alvord" <[email protected]> wrote:
> >
> >> Ric,
> >>
> >> Here's a response to an old thread which I took from my "things to
> >> think about collection:
> >>
> >> group2=:(+/\@(* #) I. i.@#@]) </. ]
> >> 0.35 0.3 0.3 group2 i.14
> >> ┌─────────┬─────────┬───────────┐
> >> │0 1 2 3 4│5 6 7 8 9│10 11 12 13│
> >> └─────────┴─────────┴───────────┘
> >> f=: 13 : '(x (] I.~ [: +/\ [ * [: # ]) y)</. y'
> >> 0.35 0.3 0.3 f i.14
> >> ┌─────────┬─────────┬───────────┐
> >> │0 1 2 3 4│5 6 7 8 9│10 11 12 13│
> >> └─────────┴─────────┴───────────┘
> >>
> >> group2
> >> (+/\@(* #) I. i.@#@]) </. ]
> >> f
> >> ] </.~ ] I.~ [: +/\ [ * [: # ]
> >>
> >> I was surprised at how neat f turned out when I wrote an explicit
> >> definition of my version of you way to group the numbers.
> >>
> >> Linda
> >>
> >>
> >> -----Original Message-----
> >> From: Programming [mailto:[email protected]]
> >> On Behalf Of Ric Sherlock
> >> Sent: Saturday, October 21, 2017 3:21 PM
> >> To: Programming JForum <[email protected]>
> >> Subject: Re: [Jprogramming] Splitting an Array into several arrays
> >>
> >> Jon,
> >> The following assigns each of the data points to a group, then
> >> boxes
> those
> >> groups using key.
> >>
> >> assignGrp=: +/\@(* #) I. i.@#@]
> >> group=: assignGrp </. ]
> >> 0.35 0.35 0.3 group i.14
> >> ┌─────────┬─────────┬───────────┐
> >> │0 1 2 3 4│5 6 7 8 9│10 11 12 13│
> >> └─────────┴─────────┴───────────┘
> >>
> >> On 21/10/2017 02:14, "'Jon Hough' via Programming" <
> >> [email protected]> wrote:
> >>
> >> > Hi,
> >> >
> >> > What I am really after is a verb that splits by percentage. To
> >> > give a concrete uses case:
> >> > I have a dataset, which I wish to split into training set,
> >> > validation set, and testing set.
> >> >
> >> > I want 35% of the datapoints to go in the training set, 35% go in
> >> > the validation set, the rest go in the test set. (Just example numbers).
> >> >
> >> >
> >> > No need to worry about shuffling, randomizing etc, I am assuming
> >> > the data is sufficiently random.
> >> > As Raul said, I can simplify slightly by just using the size of
> >> > the dataset as the right argument.
> >> >
> >> > --------------------------------------------
> >> > On Fri, 10/20/17, Erling Hellenäs <[email protected]> wrote:
> >> >
> >> > Subject: Re: [Jprogramming] Splitting an Array into several
> >> > arrays
> >> > To: [email protected]
> >> > Date: Friday, October 20, 2017, 10:06 PM
> >> >
> >> > Hi all !
> >> >
> >> > A splitSubs with CutN could possibly look like
> >> > this:
> >> >
> >> > splitSubsE=: ([ (([:
> >> > # [) {. ]) ([: <. 0.5 + [: }: [ * [: # ]) ( [ , ([:
> >> > # ]) - [: +/ [) ]) CutN ]
> >> >
> >> > (i.0) splitSubsE i.0
> >> >
> >> > (,55) splitSubsE ,5
> >> > ┌─┐
> >> > │5│
> >> > └─┘
> >> > split
> >> > splitSubsE i.0
> >> > ┌┬┬┐
> >> > ││││
> >> > └┴┴┘
> >> > split splitSubsE i.1
> >> > ┌┬┬─┐
> >> > │││0│
> >> > └┴┴─┘
> >> > split
> >> > splitSubsE i.2
> >> > ┌─┬─┬┐
> >> > │0│1││
> >> > └─┴─┴┘
> >> > split
> >> > splitSubsE i.3
> >> > ┌─┬─┬─┐
> >> > │0│1│2│
> >> > └─┴─┴─┘
> >> >
> >> > split splitSubsE i.4
> >> > ┌─┬─┬───┐
> >> > │0│1│2 3│
> >> > └─┴─┴───┘
> >> >
> >> > Cheers
> >> >
> >> > Erling
> >> > Hellenäs
> >> >
> >> >
> >> > Den 2017-10-20 kl. 14:11, skrev Erling
> >> > Hellenäs:
> >> > > Hi all!
> >> > >
> >> > > I looked for a
> >> > version of Cut which takes the number of items in each > group
> >> > as left argument. I didn't find one. I think it is what you most
> >> > > often need, because it allows groups with zero length content.
> >> > >
> >> > > I made CutN as an
> >> > illustration:
> >> > >
> >> > >
> >> > CutN=:((# {. 0 , [: }: [: +/\ ])([: < [ + [: i. ])"0 ])@:[ {&.>/ [:
> >> > < ] >
> >> > > (i.0) CutN i.0
> >> > >
> >> > > (,0) CutN i.0
> >> > > ┌┐
> >> > > ││
> >> > > └┘
> >> > > (,1) CutN
> >> > 10+i.1
> >> > > ┌──┐
> >> > > │10│
> >> > >
> >> > └──┘
> >> > > 0 2 CutN 10+i.2
> >> > > ┌┬─────┐
> >> > > ││10 11│
> >> > >
> >> > └┴─────┘
> >> > > 2 5 0
> >> > CutN 10+i.7
> >> > >
> >> > ┌─────┬──────────────┬┐
> >> > > │10 11│12 13 14 15 16││
> >> > >
> >> > └─────┴──────────────┴┘
> >> > > 0 7 0 CutN 10+i.7
> >> > >
> >> > ┌┬────────────────────┬┐
> >> > > ││10 11 12 13 14 15 16││
> >> > >
> >> > └┴────────────────────┴┘
> >> > >
> >> > > Cheers,
> >> > >
> >> > > Erling Hellenäs
> >> > >
> >> > >
> >> > >
> >> > Den 2017-10-20 kl. 10:42, skrev 'Jon Hough' via
> >> > Programming:
> >> > >> The problem:
> >> > >> Let X be an array.
> >> > >> X=: i. 50 NB. example
> >> > >>
> >> > >> Let
> >> > 'split' be the percentages that each subarray takes from X, >>
> >> > sequentially >> e.g >> split =:
> >> > 0.35 0.35 0.3 NB. first array takes 35% , second sub array
> >> >
> >> > >> takes 35%, third takes 30%
> >> > >> So in the end
> >> > >>
> >> > >> My
> >> > solution
> >> > >>
> >> > >>
> >> > splitSubs =:
> >> > -.~&.>/\@:(i.&.>"0@:<"0)@:}.@:>.@:((+/\
> >> > - ])@:[ (* , ])
> >> > >> #@:])
> >> > >>
> >> > >> split
> >> > splitSubs X
> >> > >>
> >> > >>
> >> > >> This gives 3
> >> > boxed arrays. Each array holds the indices to take from X.
> >> > >>
> >> > >>
> >> > There is a slight problem in that the first and second subarrays
> >> > >> have different >> length, due to rounding error. I am not
> >> > too bothered about that >> since, depending on the size of X
> >> > and the percentages, this is >> unavoidable.
> >> > >>
> >> > >> Any more
> >> > succinct, nicer solutions?
> >> > >>
> >> >
> >> > ------------------------------------------------------------
> ----------
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> >> > FxAt5Ak9YF4R8LJx6WxAUuu4aMHbNtS5nqex%2B64%3D&reserved=0%2Fforums.
> >> > htm&data=02%7C01%7C%7C8e7b5701e9944d46
> >> > 1cc208d54511caf9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636
> >> > 490865071867386&sdata=BzbBjTcreNzENf7febTcDhCac66Yws1z%2Fb%2Fdvg5
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> >> > FxAt5Ak9YF4R8LJx6WxAUuu4aMHbNtS5nqex%2B64%3D&reserved=0%2Fforums.
> >> > htm&data=02%7C01%7C%7C8e7b5701e9944d46
> >> > 1cc208d54511caf9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636
> >> > 490865071867386&sdata=BzbBjTcreNzENf7febTcDhCac66Yws1z%2Fb%2Fdvg5
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> >> > 490865071867386&sdata=BzbBjTcreNzENf7febTcDhCac66Yws1z%2Fb%2Fdvg5
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> >> > 11caf9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C6364908650718
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