<div id="AOLMsgPart_1.2_aec18402-3413-4280-bcfb-e806a60d2745"><div class="aolReplacedBody"><div class="aolmail_WordSection1" style="page: WordSection1;"><p class="aolmail_MsoNormal" style="font-family: Arial, sans-serif; margin: 0in 0in 0.0001pt; font-size: 12pt;"><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">group2</span></p><p class="aolmail_MsoNormal" style="font-family: Arial, sans-serif; margin: 0in 0in 0.0001pt; font-size: 12pt;"><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">(+/\@(* #) I. i.@#@]) </. ]</span></p><p class="aolmail_MsoNormal" style="font-family: Arial, sans-serif; margin: 0in 0in 0.0001pt; font-size: 12pt;"><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">0.35 0.3 0.3 group2 i.20</span></p><p class="aolmail_MsoNormal" style="font-family: Arial, sans-serif; margin: 0in 0in 0.0001pt; font-size: 12pt;"><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">┌───────────────</span><span style="font-size: 8pt; color: windowtext;">┬</span><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">───────────────</span><span style="font-size: 8pt; color: windowtext;">┬</span><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">─────────────────┐</span></p><p class="aolmail_MsoNormal" style="font-family: Arial, sans-serif; margin: 0in 0in 0.0001pt; font-size: 12pt;"><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">│0 1 2 3 4 5 6 7│8 9 10 11 12 13│14 15 16 17 18 19│</span></p><p class="aolmail_MsoNormal" style="font-family: Arial, sans-serif; margin: 0in 0in 0.0001pt; font-size: 12pt;"><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">└───────────────</span><span style="font-size: 8pt; color: windowtext;">┴</span><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">───────────────</span><span style="font-size: 8pt; color: windowtext;">┴</span><span style="font-size: 8pt; font-family: Calibri, sans-serif; color: windowtext;">─────────────────┘</span><span style="font-size: 8pt; font-family: "Lucida Console"; color: windowtext;"></span></p></div></div></div><div style="position: relative;"><div id="phone-ad" class="phone-ad msg-read-ad AdBottomOfMsgRead" aria-hidden="true" style="display: block; transform: scale(1.30097);"><iframe itemscope="" itemtype="https://schema.org/WPAdBlock"; width="320" height="50" title="Ad" marginwidth="0" marginheight="0" allowtransparency="true" frameborder="0" scrolling="no" id="adsF1" name="adsF1" src="https://at.atwola.com/adiframe/3.0/5113.1/221794/0/-1/size=320x50;noperf=1;alias=93420692;noaddonpl=y;kvpg=%2Fmail.aol%2Fwebmail%2Fen-us%2Fmobile;kvugc=0;kvui=ec397f0ba2e948b884df9068293bb651;kvh5lsid=0;kvrefd=my.screenname.aol.com;kvdom=mail.aol.com;kvpage=fd125c63989a78e40505e90ca827438d60689eab;kvmn=93420692;kvgrp=637491935;kvismob=1;extmirroring=0;kvtile=2;target=_blank;aduho=-240;grp=637491935"; style="margin-bottom: 20px;"></iframe></div></div> Sent from AOL Mobile Mail
-----Original Message----- From: Ric Sherlock <[email protected]> To: Programming JForum <[email protected]> Sent: Sat, Oct 21, 2017 03:21 PM 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" < <a href="mailto:[email protected]";>[email protected]</a>> 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 <<a > href="mailto:[email protected]";>[email protected]</a>> wrote: > > Subject: Re: [Jprogramming] Splitting an Array into several arrays > To: <a href="mailto:[email protected]";>[email protected]</a> > 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? > >> > ---------------------------------------------------------------------- > >> For information about J forums see <a > href="http://www.jsoftware.com/forums.htm"; > target="_blank">http://www.jsoftware.com/forums.htm</a> > > > > > ---------------------------------------------------------------------- > > For information about J forums see <a > href="http://www.jsoftware.com/forums.htm"; > target="_blank">http://www.jsoftware.com/forums.htm</a> > > ---------------------------------------------------------------------- > For information about J forums see <a > href="http://www.jsoftware.com/forums.htm"; > target="_blank">http://www.jsoftware.com/forums.htm</a> > ---------------------------------------------------------------------- > For information about J forums see <a > href="http://www.jsoftware.com/forums.htm"; > target="_blank">http://www.jsoftware.com/forums.htm</a> ---------------------------------------------------------------------- For information about J forums see <a href="http://www.jsoftware.com/forums.htm"; target="_blank">http://www.jsoftware.com/forums.htm</a> ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
