Programmer Guide/Command Reference/EVAL/select - Revision history

Jw at 14:46, 1 October 2015

2015-10-01T14:46:47Z

← Older revision		Revision as of 16:46, 1 October 2015
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	[[../#Functions\|<function list>]]		[[../#Functions\|<function list>]]


	Example:		Example:

193.171.195.48 at 10:47, 21 April 2011

2011-04-21T10:47:31Z

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	;See also: [[../vsubc\|vsubc]], [[../limit\|limit, limitlow, limithigh]]		;See also: [[../vsubc\|vsubc]], [[../limit\|limit, limitlow, limithigh]]

			[[../#Functions\|<function list>]]


	Example:		Example:
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	// -> $#d = { 0 , -1 , 2 , -1 , 4 , -1 , 6 , -1 , 8 }		// -> $#d = { 0 , -1 , 2 , -1 , 4 , -1 , 6 , -1 , 8 }
	</pre>		</pre>

	~~[[../#Functions\|<function list>]]~~

193.171.195.48 at 10:47, 21 April 2011

2011-04-21T10:47:14Z

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	:;<var>x</var>: condition vector; must be a vector!		:;<var>x</var>: condition vector; must be a vector!
	:;<var>t</var>: threshold		:;<var>t</var>: threshold
	:;<var>yl</var>: result if <code>''x''[''i''] <= ''t''{[''i'']}</code>		:;<var>yl</var>: result if <code>''x''[''i''] ≤ ''t''{[''i'']}</code>
	:;<var>yh</var>: result if <code>''x''[''i''] > ''t''{[''i'']}</code>		:;<var>yh</var>: result if <code>''x''[''i''] > ''t''{[''i'']}</code>
	:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''		:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''

193.171.195.48 at 10:46, 21 April 2011

2011-04-21T10:46:29Z

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	{{DISPLAYTITLE:{{SUBPAGENAME}}}}		{{DISPLAYTITLE:{{SUBPAGENAME}}}}
	Conditional merge of selected elements of two vectors and/or scalars.		Conditional merge of selected elements of two vectors and/or scalars.
	;Usage: ~~'''~~<code>select(<var>x</var>, <var>t</var>, <var>yl</var>, <var>yh</var>)</code>~~'''~~		;Usage: <code>select(<var>x</var>, <var>t</var>, <var>yl</var>, <var>yh</var>)</code>
	:;<var>x</var>: condition vector; must be a vector!		:;<var>x</var>: condition vector; must be a vector!
	:;<var>t</var>: threshold		:;<var>t</var>: threshold
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	:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''		:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''
	;Result: A vector ''r'' with ...		;Result: A vector ''r'' with ...
	::<code>''r''[i] = ''yl''{[''i'']}</code> if <code>''x''[''i''] <= ''t''{[''i'']}</code> and		::<code>''r''[i] = ''yl''{[''i'']}</code> if <code>''x''[''i''] ≤ ''t''{[''i'']}</code> and
	::<code>''r''[i] = ''yh''{[''i'']}</code> if <code>''x''[''i''] > ''t''{[''i'']}</code>		::<code>''r''[i] = ''yh''{[''i'']}</code> if <code>''x''[''i''] > ''t''{[''i'']}</code>
	:The result r has the same length as ''x''.		:The result r has the same length as ''x''.

	;See also: [[~~Programmer_Guide/Command_Reference/EVAL~~/vsubc\|vsubc]], [[~~Programmer_Guide/Command_Reference/EVAL~~/limit\|limit, limitlow, limithigh]]		;See also: [[../vsubc\|vsubc]], [[../limit\|limit, limitlow, limithigh]]

	Example:		Example:
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	</pre>		</pre>

	[[~~Programmer_Guide~~/~~Command_Reference/EVAL~~#Functions\|<function list>]]		[[../#Functions\|<function list>]]

Toni at 11:31, 6 April 2011

2011-04-06T11:31:37Z

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	:The result r has the same length as ''x''.		:The result r has the same length as ''x''.

	;See also: ~~[[Programmer_Guide/Command_Reference/EVAL/vsubn\|vsubn]],~~ [[Programmer_Guide/Command_Reference/EVAL/vsubc\|vsubc]], [[Programmer_Guide/Command_Reference/EVAL/limit\|limit, limitlow, limithigh~~]], [[Programmer_Guide/Command_Reference/EVAL/vvset\|vv~~]]		;See also: [[Programmer_Guide/Command_Reference/EVAL/vsubc\|vsubc]], [[Programmer_Guide/Command_Reference/EVAL/limit\|limit, limitlow, limithigh]]

	Example:		Example:

Toni at 11:28, 6 April 2011

2011-04-06T11:28:00Z

← Older revision		Revision as of 13:28, 6 April 2011
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	:The result r has the same length as ''x''.		:The result r has the same length as ''x''.

	;See also: [[Programmer_Guide/Command_Reference/EVAL/vsubn\|vsubn]], [[Programmer_Guide/Command_Reference/EVAL/~~select~~\|vsubc]], [[Programmer_Guide/Command_Reference/EVAL/vvset\|vv]]		;See also: [[Programmer_Guide/Command_Reference/EVAL/vsubn\|vsubn]], [[Programmer_Guide/Command_Reference/EVAL/vsubc\|vsubc]], [[Programmer_Guide/Command_Reference/EVAL/limit\|limit, limitlow, limithigh]], [[Programmer_Guide/Command_Reference/EVAL/vvset\|vv]]

	Example:		Example:
	<pre>		<pre>
	#a := eval vv(1,2,3,4,5,4,3,2,1)		#a := eval vv(1,2,3,4,5,4,3,2,1)
	~~0 1 2 3 4 5 6 7 8~~
	#b := eval fill(9,0,1)		#b := eval fill(9,0,1)
	#c := eval select($#a,3,0,$#a)		#c := eval select($#a,3,0,$#a)

Toni at 11:23, 6 April 2011

2011-04-06T11:23:45Z

← Older revision		Revision as of 13:23, 6 April 2011
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	:;<var>x</var>: condition vector; must be a vector!		:;<var>x</var>: condition vector; must be a vector!
	:;<var>t</var>: threshold		:;<var>t</var>: threshold
	:;<var>yl</var>: result if <code>''x''[''i]'' <= ''t''{[''i'']}</code>		:;<var>yl</var>: result if <code>''x''[''i''] <= ''t''{[''i'']}</code>
	:;<var>yh</var>: result if <code>''x''[''i]'' > ''t''{[''i'']}</code>		:;<var>yh</var>: result if <code>''x''[''i''] > ''t''{[''i'']}</code>
	:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''		:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''
	;Result: A vector ''r'' with ...		;Result: A vector ''r'' with ...

Toni at 11:23, 6 April 2011

2011-04-06T11:23:27Z

← Older revision		Revision as of 13:23, 6 April 2011
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	:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''		:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''
	;Result: A vector ''r'' with ...		;Result: A vector ''r'' with ...
	::<code>''r''[i] = ''yl''{[''i'']}</code> if <code>''x''[''i]'' <= ''t''{[''i'']}</code> and		::<code>''r''[i] = ''yl''{[''i'']}</code> if <code>''x''[''i''] <= ''t''{[''i'']}</code> and
	::<code>''r''[i] = ''yh''{[''i'']}</code> if <code>''x''[''i]'' > ''t''{[''i'']}</code>		::<code>''r''[i] = ''yh''{[''i'']}</code> if <code>''x''[''i''] > ''t''{[''i'']}</code>
	:The result r has the same length as ''x''.		:The result r has the same length as ''x''.

Toni at 11:23, 6 April 2011

2011-04-06T11:23:02Z

← Older revision		Revision as of 13:23, 6 April 2011
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	:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''		:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''
	;Result: A vector ''r'' with ...		;Result: A vector ''r'' with ...
	::<code>''r''[i] = ''yl''{[''i'']}</code> if ''x''[''i]'' <= ''t''{[''i'']}</code> and		::<code>''r''[i] = ''yl''{[''i'']}</code> if <code>''x''[''i]'' <= ''t''{[''i'']}</code> and
	::<code>''r''[i] = ''yh''{[''i'']}</code> if ''x''[''i]'' > ''t''{[''i'']}</code>		::<code>''r''[i] = ''yh''{[''i'']}</code> if <code>''x''[''i]'' > ''t''{[''i'']}</code>
	:The result r has the same length as ''x''.		:The result r has the same length as ''x''.

Toni at 11:22, 6 April 2011

2011-04-06T11:22:34Z

← Older revision		Revision as of 13:22, 6 April 2011
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	:;<var>x</var>: condition vector; must be a vector!		:;<var>x</var>: condition vector; must be a vector!
	:;<var>t</var>: threshold		:;<var>t</var>: threshold
	:;<var>yl</var>: result if <code>''x''[''i]'' <= ''t''{[''i'']}		:;<var>yl</var>: result if <code>''x''[''i]'' <= ''t''{[''i'']}</code>
	:;<var>yh</var>: result if <code>''x''[''i]'' > ''t''{[''i'']}		:;<var>yh</var>: result if <code>''x''[''i]'' > ''t''{[''i'']}</code>
	::''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''		:Note: ''t'', ''yl'' and ''yh'' must be numbers or vectors with the same length as ''x''
	;Result: A vector ''r'' with ...		;Result: A vector ''r'' with ...
	::<code>''r''[i] = ''yl''{[''i'']}</code> if ''x''[''i]'' <= ''t''{[''i'']} and		::<code>''r''[i] = ''yl''{[''i'']}</code> if ''x''[''i]'' <= ''t''{[''i'']}</code> and
	::<code>''r''[i] = ''yh''{[''i'']}</code> if ''x''[''i]'' > ''t''{[''i'']}		::<code>''r''[i] = ''yh''{[''i'']}</code> if ''x''[''i]'' > ''t''{[''i'']}</code>
	:The result r has the same length as ''x''.		:The result r has the same length as ''x''.

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	Example:		Example:
	<pre>		<pre>
	#a := eval vv(1,2,3,4,5)		#a := eval vv(1,2,3,4,5,4,3,2,1)
	#b := eval ~~vmcol~~(~~$#a~~, ~~vv(5,4,3,2~~,1))		0 1 2 3 4 5 6 7 8
	#c := ~~vsubc~~($#a,0,3)		#b := eval fill(9,0,1)
	// -> ~~vector:~~ $#c = { 1 , 2 }		#c := eval select($#a,3,0,$#a)
	#d := eval ~~vsubc~~($#a,2,~~0,5~~,$#b)		// -> $#c = { 0 , 0 , 0 , 4 , 5 , 4 , 0 , 0 , 0 }
	// -> ~~matrix:~~ $#d~~[,0]~~ = { 2 , 3 , 4 }, $#d[,~~1] = { 4~~ , 3 , 2 }		#d := eval select($#a, $#b , $#b , $#a)
	#e := eval ~~vsubc~~($#a,7,2,4)		// -> $#d = { 1 , 2 , 3 , 4 , 5 , 5 , 6 , 7 , 8 }
	// -> ~~vector:~~ $#e = { 1 , 2 , 4 , 5 }		#e := eval select($#b%2, 0, $#b, -1)
			// -> $#d = { 0 , -1 , 2 , -1 , 4 , -1 , 6 , -1 , 8 }
	</pre>		</pre>

	[[Programmer_Guide/Command_Reference/EVAL#Functions\|<function list>]]		[[Programmer_Guide/Command_Reference/EVAL#Functions\|<function list>]]