Indices - Revision history

Sudleyplace at 22:49, 15 April 2018

2018-04-15T22:49:10Z

← Older revision		Revision as of 18:49, 15 April 2018
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	<p>For example, in origin-0</p>		<p>For example, in origin-0</p>

	<apll>~~      ~~⍸,3~~<br />~~		<apll><pre>
	0 0 0~~<br />~~		⍸,3
	~~      ~~⍬⍬⍬≡⍸3 ⍝ for scalar S, ⍸S ←→ S⍴⊂⍬ as per the definition R/⍳⍴R~~<br />~~		0 0 0
	1~~<br />~~		⍬⍬⍬≡⍸3 ⍝ for scalar S, ⍸S ←→ S⍴⊂⍬ as per the definition R/⍳⍴R
	~~      ~~⍬≡⍸⍬~~<br />~~		1
	1~~<br />~~		⍬≡⍸⍬
	~~      ~~⍸1 0 1 1 1 0 1~~<br />~~		1
	0 2 3 4 6~~<br />~~		⍸1 0 1 1 1 0 1
	~~      ~~⍸'Now is the time'=' '~~<br />~~		0 2 3 4 6
	3 6 10~~<br />~~		⍸'Now is the time'=' '
	~~      ~~⍸2 3 4~~<br />~~		3 6 10
	0 0 1 1 1 2 2 2 2~~<br />~~		⍸2 3 4
	~~      ~~⍸⎕←2 3⍴⍳4~~<br />~~		0 0 1 1 1 2 2 2 2
	~~ ~~0 1 2~~<br />~~		⍸⎕←2 3⍴⍳4
	~~ ~~3 0 1~~<br />~~		0 1 2
	~~ ~~0 1~~ ~~ 0 2~~ ~~ 0 2~~ ~~ 1 0~~ ~~ 1 0~~ ~~ 1 0~~ ~~ 1 2~~<br />~~		3 0 1
	~~      ~~⍸1 2 3⍴⍳4~~<br />~~		0 1 0 2 0 2 1 0 1 0 1 0 1 2
	~~ ~~0 0 1~~ ~~ 0 0 2~~ ~~ 0 0 2~~ ~~ 0 1 0~~ ~~ 0 1 0~~ ~~ 0 1 0~~ ~~ 0 1 2~~<br />~~		⍸1 2 3⍴⍳4
	~~<br />~~		0 0 1 0 0 2 0 0 2 0 1 0 0 1 0 0 1 0 0 1 2
	~~    ~~∇ Z←(Txt Rep) txtrep Z;a~~<br />~~
	[1]~~   ~~⍝ Replace Txt in Z with Rep.~~<br />~~		∇ Z←(Txt Rep) txtrep Z;a
	[2]~~   ~~:Assert 2=⍴⍴Z ⋄ :Assert (⍴Txt)≡⍴Rep~~<br />~~		[1] ⍝ Replace Txt in Z with Rep.
	[3]~~   ~~a←⍸Txt⍷Z~~<br />~~		[2] :Assert 2=⍴⍴Z ⋄ :Assert (⍴Txt)≡⍴Rep
	[4]~~   ~~Z[⊃⊃¨,¨/¨a+⊂0(0..¯1+⍴Txt)]←((⍴a),⍴Rep)⍴Rep~~<br />~~		[3] a←⍸Txt⍷Z
	~~    ~~∇~~<br />~~		[4] Z[⊃⊃¨,¨/¨a+⊂0(0..¯1+⍴Txt)]←((⍴a),⍴Rep)⍴Rep
	~~      ~~'Now' 'Who' txtrep 4 13⍴'Now is the time...'~~<br />~~		∇
	Who is the ti~~<br />~~		'Now' 'Who' txtrep 4 13⍴'Now is the time...'
	me...Who is t~~<br />~~		Who is the ti
	he time...Who~~<br />~~		me...Who is t
	~~ ~~is the time.</apll>		he time...Who
			is the time.</pre></apll>

Sudleyplace at 23:43, 4 February 2018

2018-02-04T23:43:52Z

← Older revision		Revision as of 19:43, 4 February 2018
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	<td></td>		<td></td>
	<td></td>		<td></td>
	<td>returns a simple integer vector or nested vector of integer vectors identical to <apll>(,R)/,~~⍳⍴1/R~~</apll>.</td>		<td>returns a simple integer vector or nested vector of integer vectors identical to <apll>(,R)/,⍳⍴R</apll>.</td>
	</tr>		</tr>
	</table>		</table>
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	</tr>		</tr>
	<tr>		<tr>
	<td><apll>Z</apll> is an integer vector of length <apll>+/,R</apll>.</td>		<td>For vector <apll>R</apll>, <apll>Z</apll> is an integer vector. For all other ranks of <apll>R</apll>, <apll>Z</apll> is a nested vector of integer vectors. In both case the length of <apll>Z</apll> is <apll>+/,R</apll>.</td>
	</tr>		</tr>
	<tr>		<tr>
	<td>For scalars or vectors, the result is equivalent to <apll>R/~~⍳⍴1/R~~</apll> which encapsulates a very common idiom in one symbol.</td>		<td>For scalars or vectors, the result is equivalent to <apll>R/⍳⍴R</apll> which encapsulates a very common idiom in one symbol.</td>
	</tr>		</tr>
	<tr>		<tr>
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	<p>For example, in origin-0</p>		<p>For example, in origin-0</p>

	<apll>      ⍸3<br />		<apll>      ⍸,3<br />
	0 0 0<br />		0 0 0<br />
			⍬⍬⍬≡⍸3 ⍝ for scalar S, ⍸S ←→ S⍴⊂⍬ as per the definition R/⍳⍴R<br />
			1<br />
			⍬≡⍸⍬<br />
			1<br />
	⍸1 0 1 1 1 0 1<br />		⍸1 0 1 1 1 0 1<br />
	0 2 3 4 6<br />		0 2 3 4 6<br />

WikiSysop at 15:45, 26 May 2013

2013-05-26T15:45:01Z

← Older revision		Revision as of 11:45, 26 May 2013
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	⍸1 0 1 1 1 0 1<br />		⍸1 0 1 1 1 0 1<br />
	0 2 3 4 6<br />		0 2 3 4 6<br />
			⍸'Now is the time'=' '<br />
			3 6 10<br />
	⍸2 3 4<br />		⍸2 3 4<br />
	0 0 1 1 1 2 2 2 2<br />		0 0 1 1 1 2 2 2 2<br />

WikiSysop at 15:42, 26 May 2013

2013-05-26T15:42:19Z

← Older revision		Revision as of 11:42, 26 May 2013
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	<td></td>		<td></td>
	<td></td>		<td></td>
	<td>returns a simple integer vector or nested vector of integer vectors identical to <apll>(,R)/⍳⍴1/R</apll>.</td>		<td>returns a simple integer vector or nested vector of integer vectors identical to <apll>(,R)/,⍳⍴1/R</apll>.</td>
	</tr>		</tr>
	</table>		</table>
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	<tr>		<tr>
	<td>For higher rank arrays, the result extends to produce a nested vector of vectors of the indices of all the positive integer elements of <apll>R</apll> replicated as per the corresponding value in <apll>R</apll>.</td>		<td>For higher rank arrays, the result extends to produce a nested vector of vectors of the indices of all the positive integer elements of <apll>R</apll> replicated as per the corresponding value in <apll>R</apll>.</td>
			</tr>
			<tr>
			<td>This function is sensitive to <apll>⎕IO</apll>.</td>
	</tr>		</tr>
	</table>		</table>

WikiSysop at 20:31, 16 November 2012

2012-11-16T20:31:23Z

← Older revision		Revision as of 16:31, 16 November 2012
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	<td></td>		<td></td>
	<td></td>		<td></td>
	<td>returns a simple integer vector or nested vector of integer vectors identical to <apll>~~⊃,/~~,R/~~¨⊂¨⍳⍴1~~/R</apll>.</td>		<td>returns a simple integer vector or nested vector of integer vectors identical to <apll>(,R)/⍳⍴1/R</apll>.</td>
	</tr>		</tr>
	</table>		</table>
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	<p>For example, in origin-0</p>		<p>For example, in origin-0</p>

	<apll>      ⍸1 0 1 1 1 0 1<br />		<apll>      ⍸3<br />
			0 0 0<br />
			⍸1 0 1 1 1 0 1<br />
	0 2 3 4 6<br />		0 2 3 4 6<br />
	⍸2 3 4<br />		⍸2 3 4<br />

WikiSysop at 16:37, 30 October 2012

2012-10-30T16:37:12Z

← Older revision		Revision as of 12:37, 30 October 2012
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	<td></td>		<td></td>
	<td></td>		<td></td>
	<td>returns an integer vector or nested vector of integer vectors identical to <apll>⊃,/,R/¨⊂¨⍳⍴1/R</apll>.</td>		<td>returns a simple integer vector or nested vector of integer vectors identical to <apll>⊃,/,R/¨⊂¨⍳⍴1/R</apll>.</td>
	</tr>		</tr>
	</table>		</table>
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	</tr>		</tr>
	<tr>		<tr>
	<td><apll>R</apll> is an array of non-negative integers.</td>		<td><apll>R</apll> is a simple array of non-negative integers.</td>
	</tr>		</tr>
	<tr>		<tr>

WikiSysop at 16:34, 30 October 2012

2012-10-30T16:34:15Z

← Older revision		Revision as of 12:34, 30 October 2012
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	<td></td>		<td></td>
	<td></td>		<td></td>
	<td>returns an integer vector identical to <apll>R/~~⍳>~~R</apll>.</td>		<td>returns an integer vector or nested vector of integer vectors identical to <apll>⊃,/,R/¨⊂¨⍳⍴1/R</apll>.</td>
	</tr>		</tr>
	</table>		</table>
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	</tr>		</tr>
	<tr>		<tr>
	<td><apll>R</apll> is ~~a scalar or vector~~ of non-negative integers.</td>		<td><apll>R</apll> is an array of non-negative integers.</td>
	</tr>		</tr>
	<tr>		<tr>
	<td><apll>Z</apll> is an integer vector of length <apll>+/R</apll>~~whose values are <apll>R/⍳>R</apll> where monadic <apll>></apll> is the [[Tally]] function~~.</td>		<td><apll>Z</apll> is an integer vector of length <apll>+/,R</apll>.</td>
	</tr>		</tr>
	<tr>		<tr>
	<td>~~This feature~~ encapsulates a very common idiom in one symbol.</td>		<td>For scalars or vectors, the result is equivalent to <apll>R/⍳⍴1/R</apll> which encapsulates a very common idiom in one symbol.</td>
			</tr>
			<tr>
			<td>For higher rank arrays, the result extends to produce a nested vector of vectors of the indices of all the positive integer elements of <apll>R</apll> replicated as per the corresponding value in <apll>R</apll>.</td>
	</tr>		</tr>
	</table>		</table>
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	0 2 3 4 6<br />		0 2 3 4 6<br />
	⍸2 3 4<br />		⍸2 3 4<br />
	0 0 1 1 1 2 2 2 2</apll>		0 0 1 1 1 2 2 2 2<br />
			⍸⎕←2 3⍴⍳4<br />
			0 1 2<br />
			3 0 1<br />
			0 1  0 2  0 2  1 0  1 0  1 0  1 2<br />
			⍸1 2 3⍴⍳4<br />
			0 0 1  0 0 2  0 0 2  0 1 0  0 1 0  0 1 0  0 1 2<br />
			<br />
			∇ Z←(Txt Rep) txtrep Z;a<br />
			[1]   ⍝ Replace Txt in Z with Rep.<br />
			[2]   :Assert 2=⍴⍴Z ⋄ :Assert (⍴Txt)≡⍴Rep<br />
			[3]   a←⍸Txt⍷Z<br />
			[4]   Z[⊃⊃¨,¨/¨a+⊂0(0..¯1+⍴Txt)]←((⍴a),⍴Rep)⍴Rep<br />
			∇<br />
			'Now' 'Who' txtrep 4 13⍴'Now is the time...'<br />
			Who is the ti<br />
			me...Who is t<br />
			he time...Who<br />
			is the time.</apll>

WikiSysop: Created page with "

2010-08-29T22:16:26Z

Created page with "<table border="1" cellpadding="5" cellspacing="0" rules="none" summary=""> <tr> <td> <table border="0" cellpadding="5" cellspacing="0" summary=""> <tr> <td valign…"

New page
<table border="1" cellpadding="5" cellspacing="0" rules="none" summary="">
<tr>
<td>
<table border="0" cellpadding="5" cellspacing="0" summary="">
<tr>
<td valign="top"><apll>Z←⍸R</apll></td>
<td></td>
<td></td>
<td>returns an integer vector identical to <apll>R/⍳>R</apll>.</td>
</tr>
</table>
</td>
</tr>
<tr>
<td><apll>R</apll> is a scalar or vector of non-negative integers.</td>
</tr>
<tr>
<td><apll>Z</apll> is an integer vector of length <apll>+/R</apll>whose values are <apll>R/⍳>R</apll> where monadic <apll>></apll> is the [[Tally]] function.</td>
</tr>
<tr>
<td>This feature encapsulates a very common idiom in one symbol.</td>
</tr>
</table>
<br />
<p>For example, in origin-0</p>

<apll>      ⍸1 0 1 1 1 0 1<br />
0 2 3 4 6<br />
      ⍸2 3 4<br />
0 0 1 1 1 2 2 2 2</apll>