Domino - Revision history

Paul Robinson: Paul Robinson moved page Symbol Domino to Domino: Page is of sufficient quality to be upgradwd to standalone sympbol name alone

2019-10-16T16:50:06Z

Paul Robinson moved page Symbol Domino to Domino: Page is of sufficient quality to be upgradwd to standalone sympbol name alone

← Older revision	Revision as of 12:50, 16 October 2019
(No difference)

Paul Robinson: explain & add cat

2019-10-16T16:42:02Z

explain & add cat

← Older revision		Revision as of 12:42, 16 October 2019
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	__NOTOC__		__NOTOC__
	<h1> {domino} — Matrix Inverse or Division — Keystroke ALT+SHIFT+= — Character 9017</h1>		<h1> {domino} — Matrix Inverse or Division — Keystroke ALT+SHIFT+= — Character 9017 or 0x2339</h1>
	Note: The symbol is created by ALT+SHIFT+=; ALT+= will produce [[Symbol Divide\|Divide]] <big>(<big>'''{divide}'''</big>)</big>		Note: The symbol is created by ALT+SHIFT+=; ALT+= will produce [[Symbol Divide\|Divide]] <big>(<big>'''{divide}'''</big>)</big><br />
			'''Caution:''' Be careful not to confuse this symbol, which is <apll>⌹</apll>, with <apll>⍠</apll> which is [[Variant]].

	[[File:APLKB-Domino.png]]		[[File:APLKB-Domino.png]]
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	</big>		</big>

	{{Article ~~footer}}~~		{{Article footer\|2\|Domino}}
	~~{{Symbol~~ footer\|2\|D}}		[[Category:Monadic operators]][[Category:Dyadic operators]]

Robert Wallick: /* Usage */ added link to Matrix Inverse/Divide wiki page

2015-07-31T01:39:50Z

Usage: added link to Matrix Inverse/Divide wiki page

← Older revision		Revision as of 21:39, 30 July 2015
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	[[File:APLKB-Domino.png]]		[[File:APLKB-Domino.png]]
	==Usage==		==Usage==

			See also '''[[Matrix_Inverse/Divide]]'''.

	==Examples==		==Examples==
	<big> {domino} Monadic Example - Matrix Inverse for a square matrix:		<big> {domino} Monadic Example - Matrix Inverse for a square matrix:

Robert Wallick: wording

2015-03-04T01:44:38Z

wording

← Older revision		Revision as of 21:44, 3 March 2015
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	Homes ⍝The first row of variable/matrix Homes has nested column headers, with 22 data rows:		Homes ⍝The first row of variable/matrix Homes has nested column headers, with 22 data rows:
	⍝Col#'s 1 2 3 4 5 6 7 8		⍝Col#'s 1 2 3 4 5 6 7 8
	Property SqFt #Bedrooms #FullBaths #HalfBaths YrsAgoBuilt Price Predicted Price ⍝Note ~~that~~ Predicted Price col(8) is not yet calculated!		Property SqFt #Bedrooms #FullBaths #HalfBaths YrsAgoBuilt Price Predicted Price ⍝Note: Predicted Price col(8) is not yet calculated!
	A 2149 3 2 1 15 469.9 0		A 2149 3 2 1 15 469.9 0
	B 2410 4 3 1 13 523.5 0		B 2410 4 3 1 13 523.5 0
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	V 3835 3 3 1 6 982.5 0		V 3835 3 3 1 6 982.5 0

	RegrCoeffs←(1↓Homes[;7])⌹1,(1 0↓Homes[;2 3 4 5 6]) ⍝Calc ~~regression~~ coeff's using Home Prices(col 7, dep var Y) vs. all indep vars(X's, cols 2-6)		⍝Note just below that because the first row of Homes has column headers(text) - they must be dropped from ⌹'s least-squares data fit.
	⍴RegrCoeffs ⍝Note '⌹1,' just above means add extra coeff. for Y-intercept; plus cols(2-6)=5 indep X-type vars; RegrCoeffs has 6 elements.		RegrCoeffs←(1↓Homes[;7])⌹1,(1 0↓Homes[;2 3 4 5 6]) ⍝Calc regr. coeff's using Home Prices(col 7, dep var Y) vs. all indep vars(X's, cols 2-6)
			⍴RegrCoeffs ⍝Note '⌹1,' just above means add extra coeff. for Y-intercept; plus cols(2-6)=5 indep X-type vars; RegrCoeffs has 6 elements.
	6		6
	RegrCoeffs		RegrCoeffs
	234.9773005 0.1495539775 ¯41.70990009 80.27420326 16.19671155 ¯7.019567895		234.9773005 0.1495539775 ¯41.70990009 80.27420326 16.19671155 ¯7.019567895

	Homes[1+⍳22;8]←(1,Homes[1+⍳22;2 3 4 5 6])+.×RegrCoeffs ⍝Use inner product +.× to ~~calculate~~ predicted prices, place in ~~column~~ 8.		Homes[1+⍳22;8]←(1,Homes[1+⍳22;2 3 4 5 6])+.×RegrCoeffs ⍝Use inner product +.× to calc predicted prices for 22 data rows, place in col 8.

	Homes ⍝The following is what variable Homes looks like; with Predicted Prices calculated and inserted back into matrix Homes:		Homes ⍝The following is what variable Homes looks like; with Predicted Prices calculated and inserted back into matrix Homes:

Robert Wallick: inserted examples for monadic and dyadic domino-matrix inverse-quad divide

2015-03-03T00:56:06Z

inserted examples for monadic and dyadic domino-matrix inverse-quad divide

@@ Line 5: / Line 5: @@
 [[File:APLKB-Domino.png]]
 ==Usage==
-==Example==
+==Examples==
 {{Article footer}}
 {{Symbol footer|2|D}}

Paul Robinson at 13:39, 13 March 2013

2013-03-13T13:39:08Z

← Older revision		Revision as of 09:39, 13 March 2013
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	==Usage==		==Usage==
	==Example==		==Example==
	~~==See Also==~~



	{{~~Language Toolbar~~}}
	~~[[Category:Mouse Group~~ 2\|D]]		{{Article footer}}
	~~[[Category:Symbols\|D]]~~		{{Symbol footer\|2\|D}}

Paul Robinson at 01:20, 4 March 2013

2013-03-04T01:20:45Z

← Older revision		Revision as of 21:20, 3 March 2013
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	<h1> {domino} — Matrix Inverse or Division — Keystroke ALT+SHIFT+= — Character 9017</h1>		<h1> {domino} — Matrix Inverse or Division — Keystroke ALT+SHIFT+= — Character 9017</h1>
	Note: The symbol is created by ALT+SHIFT+=; ALT+= will produce [[Symbol Divide\|Divide]] <big>(<big>'''{divide}'''</big>)</big>		Note: The symbol is created by ALT+SHIFT+=; ALT+= will produce [[Symbol Divide\|Divide]] <big>(<big>'''{divide}'''</big>)</big>

	[[File:APLKB-Domino.png]]		[[File:APLKB-Domino.png]]
	==Usage==		==Usage==

Paul Robinson at 13:42, 3 March 2013

2013-03-03T13:42:39Z

← Older revision		Revision as of 09:42, 3 March 2013
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	{{Language Toolbar}}		{{Language Toolbar}}
	[[Category:Mouse Group 2\|D]]		[[Category:Mouse Group 2\|D]]
			[[Category:Symbols\|D]]

Paul Robinson at 13:35, 3 March 2013

2013-03-03T13:35:40Z

← Older revision		Revision as of 09:35, 3 March 2013
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	{{Language Toolbar}}		{{Language Toolbar}}
			[[Category:Mouse Group 2\|D]]

Paul Robinson at 12:22, 3 March 2013

2013-03-03T12:22:50Z

← Older revision		Revision as of 08:22, 3 March 2013
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	__NOTOC__		__NOTOC__
	<h1> {domino} — Matrix Inverse or Division — Keystroke ALT++ ~~(Plus)~~ — Character 9017</h1>		<h1> {domino} — Matrix Inverse or Division — Keystroke ALT+SHIFT+= — Character 9017</h1>
	Note: The symbol is created by ALT+SHIFT+=; ALT+= will produce [[Symbol Divide\|Divide]] <big>(<big>'''{divide}'''</big>)</big>		Note: The symbol is created by ALT+SHIFT+=; ALT+= will produce [[Symbol Divide\|Divide]] <big>(<big>'''{divide}'''</big>)</big>
	[[File:APLKB-Domino.png]]		[[File:APLKB-Domino.png]]