Index Of - Revision history

Sudleyplace at 22:33, 15 April 2018

2018-04-15T22:33:33Z

← Older revision		Revision as of 18:33, 15 April 2018
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	<p>For example, in origin-1</p>		<p>For example, in origin-1</p>

	<apll>~~      ~~M←2 3⍴'abcdef'~~<br />~~		<apll><pre>
	~~      ~~M⍳'afg'~~<br />~~		M←2 3⍴'abcdef'
	~~ ~~1 1~~  ~~2 3~~  ~~3 4~~<br >~~		M⍳'afg'
	~~      ~~M[M⍳'af']~~<br />~~		1 1 2 3 3 4
	af~~<br />~~		M[M⍳'af']
	~~      ~~L←2 ⋄ ~~⎕fmt~~ L⍳⍳3~~<br />~~		af
	┌3──────────┐~~<br />~~		L←2 ⋄ ⎕FMT L⍳⍳3
	│┌0┐ ┌0┐ ┌0┐│~~<br />~~		┌3──────────┐
	││0│ │0│ │0││~~<br />~~		│┌0┐ ┌0┐ ┌0┐│
	│└~┘ └~┘ └~┘2<br />		││0│ │0│ │0││
	~~└∊──────────┘~~</apll>		│└~┘ └~┘ └~┘2
			└∊──────────┘</pre></apll>

	<p>Note that this extension preserves the identity <apll>R≡L[L⍳R]</apll> for all <apll>R⊆L</apll>.</p>		<p>Note that this extension preserves the identity <apll>R≡L[L⍳R]</apll> for all <apll>R⊆L</apll>.</p>
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	<p>This extension is implemented via an internal magic function:</p>		<p>This extension is implemented via an internal magic function:</p>

	<apll>~~    ~~∇~~ ~~Z←L #DydIota R;⎕IO;O~~</apll><br />~~		<apll><pre>
	~~<apll>~~[1]~~   ~~O←⎕IO ⋄ ⎕IO←0~~</apll><br />~~		∇ Z←L #DydIota R;⎕IO;O
	~~<apll>~~[2]~~   ~~Z←⊂[0] O+(1+⍴L)⊤(¯1↓,(1+⍴L)↑L)⍳R</~~apll~~>~~<br />~~		[1] O←⎕IO ⋄ ⎕IO←0
	~~<apll>    ∇~~</apll>		[2] Z←⊂[0] O+(1+⍴L)⊤(¯1↓,(1+⍴L)↑L)⍳R
			∇</pre></apll>

WikiSysop at 17:07, 13 June 2013

2013-06-13T17:07:58Z

← Older revision		Revision as of 13:07, 13 June 2013
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	</tr>		</tr>
	<tr>		<tr>
	<td><apll>L</apll> is an array of rank ~~>~~ 1.</td>		<td><apll>L</apll> is an array of rank not equal 1.</td>
	</tr>		</tr>
	<tr>		<tr>
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	</tr>		</tr>
	<tr>		<tr>
	<td>This feature extends dyadic iota to ~~rank > 1~~ left arguments.</td>		<td>This feature extends dyadic iota to non-vector left arguments.</td>
	</tr>		</tr>
	<tr>		<tr>
	<td>This function is sensitive to <apll>⎕IO</apll>.</td>		<td>This function is sensitive to <apll>⎕IO</apll> and <apll>⎕CT</apll>.</td>
	</tr>		</tr>
	</table>		</table>
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	<p>For example, in origin-1</p>		<p>For example, in origin-1</p>

	<apll>      M←2 3⍴'abcdef'~~</apll>~~<br />		<apll>      M←2 3⍴'abcdef'<br />
	~~<apll>~~      M⍳'afg'~~</apll>~~<br />		M⍳'afg'<br />
	~~<apll>~~ 1 1  2 3  3 4~~</apll>~~<br >		1 1  2 3  3 4<br >
	~~<apll>~~      M[M⍳'af']</~~apll~~><br />		M[M⍳'af']<br />
	<apll>af</apll>		af<br />
			L←2 ⋄ ⎕fmt L⍳⍳3<br />
			┌3──────────┐<br />
			│┌0┐ ┌0┐ ┌0┐│<br />
			││0│ │0│ │0││<br />
			│└~┘ └~┘ └~┘2<br />
			└∊──────────┘</apll>

			<p>Note that this extension preserves the identity <apll>R≡L[L⍳R]</apll> for all <apll>R⊆L</apll>.</p>

	<p>This extension is implemented via an internal magic function:</p>		<p>This extension is implemented via an internal magic function:</p>

WikiSysop at 15:36, 26 May 2013

2013-05-26T15:36:09Z

← Older revision		Revision as of 11:36, 26 May 2013
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	<tr>		<tr>
	<td>This feature extends dyadic iota to rank > 1 left arguments.</td>		<td>This feature extends dyadic iota to rank > 1 left arguments.</td>
			</tr>
			<tr>
			<td>This function is sensitive to <apll>⎕IO</apll>.</td>
	</tr>		</tr>
	</table>		</table>

Sudleyplace at 01:22, 8 May 2008

2008-05-08T01:22:16Z

← Older revision		Revision as of 21:22, 7 May 2008
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	<table border="0" cellpadding="5" cellspacing="0" summary="">		<table border="0" cellpadding="5" cellspacing="0" summary="">
	<tr>		<tr>
	<td><apll>Z←L⍳R</apll></td>		<td valign="top"><apll>Z←L⍳R</apll></td>
	<td></td>		<td></td>
	<td></td>		<td></td>

Sudleyplace at 19:41, 13 April 2008

2008-04-13T19:41:08Z

@@ Line 1: / Line 1: @@
-<p>Dyadic iota (<apll>L⍳R</apll>) is extended to allow <apll>1&lt;⍴⍴L</apll>, returning a nested array of shape <apll>⍴R</apll> whose items are each integer vectors of length <apll>⍴⍴R</apll>, suitable for use as indices to <apll>L</apll>.</p>
+<table border="1" cellpadding="5" cellspacing="0" rules="none" summary="">
+<tr>
 <p>For example, in origin-1</p>
 <apll>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;M←2 3⍴'abcdef'</apll><br />
-<apll>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;M⍳'af'</apll><br />
+<apll>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;M⍳'afg'</apll><br />
-<apll>&nbsp;1 1&nbsp;&nbsp;2 3</apll><br >
+<apll>&nbsp;1 1&nbsp;&nbsp;2 3&nbsp;&nbsp;3 4</apll><br >
 <apll>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;M[M⍳'af']</apll><br />
 <apll>af</apll>

Sudleyplace at 02:35, 11 April 2008

2008-04-11T02:35:13Z

← Older revision		Revision as of 22:35, 10 April 2008
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	<p>This extension is implemented via an internal magic function:</p>		<p>This extension is implemented via an internal magic function:</p>

	<apll>    ∇ Z←L F R;⎕IO;O</apll><br />		<apll>    ∇ Z←L #DydIota R;⎕IO;O</apll><br />
	<apll>[1]   O←⎕IO ⋄ ⎕IO←0</apll><br />		<apll>[1]   O←⎕IO ⋄ ⎕IO←0</apll><br />
	<apll>[2]   Z←⊂[0] O+(1+⍴L)⊤(¯1↓,(1+⍴L)↑L)⍳R</apll><br />		<apll>[2]   Z←⊂[0] O+(1+⍴L)⊤(¯1↓,(1+⍴L)↑L)⍳R</apll><br />
	<apll>    ∇</apll>		<apll>    ∇</apll>

Sudleyplace: New page:
Dyadic iota (L⍳R) is extended to allow 1<⍴⍴L, returning a nested array of shape ⍴R whose items are each integer vectors of length
2008-04-10T20:20:14Z

New page: Dyadic iota (<apll>L⍳R</apll>) is extended to allow <apll>1<⍴⍴L</apll>, returning a nested array of shape <apll>⍴R</apll> whose items are each integer vectors of length <apll...

New page
Dyadic iota (<apll>L⍳R</apll>) is extended to allow <apll>1<⍴⍴L</apll>, returning a nested array of shape <apll>⍴R</apll> whose items are each integer vectors of length <apll>⍴⍴R</apll>, suitable for use as indices to <apll>L</apll>.

For example, in origin-1

<apll>      M←2 3⍴'abcdef'</apll> 
<apll>      M⍳'af'</apll> 
<apll> 1 1  2 3</apll> 
<apll>      M[M⍳'af']</apll> 
<apll>af</apll>

This extension is implemented via an internal magic function:

<apll>    ∇ Z←L F R;⎕IO;O</apll> 
<apll>[1]   O←⎕IO ⋄ ⎕IO←0</apll> 
<apll>[2]   Z←⊂[0] O+(1+⍴L)⊤(¯1↓,(1+⍴L)↑L)⍳R</apll> 
<apll>    ∇</apll>