Symbol Zilde - Revision history

Paul Robinson at 08:30, 13 October 2019

2019-10-13T08:30:12Z

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Paul Robinson at 08:21, 13 October 2019

2019-10-13T08:21:47Z

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	<h2> {zilde} — Represents an '''empty numeric vector''' or ''zero plus tilde'' (hence zilde) — Keystroke Alt + Shift + } — Character ~~⎕UCS '⍬' = 9068</h2>~~		<h2> {zilde} — Represents an '''empty numeric vector''' or ''zero plus tilde'' (hence zilde) — Keystroke Alt + Shift + } — Character
	==Usage==		==Usage==
	<apll>      ⌊/⍬<br />		<apll>      ⌊/⍬<br />
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Paul Robinson at 08:20, 13 October 2019

2019-10-13T08:20:09Z

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Robert Wallick: expanded meaning, frame of ref. example

2016-03-12T01:13:26Z

expanded meaning, frame of ref. example

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	<apll>      ⌈/⍬<br />		<apll>      ⌈/⍬<br />
	¯∞</apll><br /><br />		¯∞</apll><br /><br />

			Symbolically zero or '''<apll>0</apll>''' represents '''number''' while tilde or '''<apll>{tilde}</apll>''' represents '''not.''' Together the overstrike zilde symbol or '''<apll>⍬</apll>''' means ''not a number'', i.e. empty numeric vector. APL frequently uses overstrike characters in '''dual-combined meaning,''' thus '''<apll>{quotequad}</apll>''' which is '''<apll>{quad}</apll>''' or prompt and the single quote symbol yielding ''prompt for string'' or <u>character input</u> '''versus''' '''<apll>{quad}</apll>''' or prompt for <u>numeric input</u>.<br>
	==Example==		==Example==
	The above examples for infinity and negative infinity correctly run in NARS2000. In '''theory ONLY - {zilde}''' would be hypothetically equivalent to <apll>⍳0</apll> or <apll>0⍴N</apll> (where N is any number) since zilde or {zilde} represents an empty numeric vector.		The above examples for infinity and negative infinity correctly run in NARS2000. In '''theory ONLY - {zilde}''' would be hypothetically equivalent to <apll>⍳0</apll> or <apll>0⍴N</apll> (where N is any number) since zilde or {zilde} represents an empty numeric vector.

Robert Wallick: Initial definition

2016-03-11T21:10:36Z

Initial definition

← Older revision		Revision as of 17:10, 11 March 2016
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	<h1> {zilde} — (~~Replace this with Meaning of symbol~~) — Keystroke ~~?ALT~~+X — Character ~~0000~~</h1>		<h2> {zilde} — Represents an '''empty numeric vector''' or ''zero plus tilde'' (hence zilde) — Keystroke Alt + Shift + } — Character ⎕UCS '⍬' = 9068</h2>
	==Usage==		==Usage==
			<apll>      ⌊/⍬<br />
			∞</apll><br /><br />
			<apll>      ⌈/⍬<br />
			¯∞</apll><br /><br />
	==Example==		==Example==
			The above examples for infinity and negative infinity correctly run in NARS2000. In '''theory ONLY - {zilde}''' would be hypothetically equivalent to <apll>⍳0</apll> or <apll>0⍴N</apll> (where N is any number) since zilde or {zilde} represents an empty numeric vector.
	==See Also==		==See Also==
			[[Infinity\|Infinity <apll>∞</apll>]]


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Paul Robinson at 17:50, 24 November 2014

2014-11-24T17:50:43Z

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Paul Robinson: new

2013-03-01T14:53:05Z

new

New page

__NOTOC__
<h1> {zilde} — (Replace this with Meaning of symbol) — Keystroke ?ALT+X — Character 0000</h1>
==Usage==
==Example==
==See Also==

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