Difference between revisions of "Sort Command"

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<noinclude>{{Manual Page|version=4.0}}[[Category:Manual (official)|{{PAGENAME}}]]</noinclude>
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<noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|list}}
{{command|list}}
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;Sort( &lt;List> )
; Sort[List]: Sorts a list of numbers, text objects, or points.
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:Sorts a list of numbers, text objects, or points.
{{Note| Lists of points are sorted by ''x''-coordinates.}}
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:{{Note| Lists of points are sorted by ''x''-coordinates.}}
{{Example|1=<div>
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:{{Examples|1=<div>
* <code>Sort[{3, 2, 1}]</code> gives you the list ''{1, 2, 3}''.
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:* <code>Sort({3, 2, 1})</code> gives you the list ''{1, 2, 3}''.
* <code>Sort[{"pears", "apples", "figs"}]</code> gives you the list elements in alphabetical order.
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:* <code>Sort({"pears", "apples", "figs"})</code> gives you the list elements in alphabetical order.
* <code>Sort[{(3, 2), (2, 5), (4, 1)}]</code> gives you ''{(2, 5), (3, 2), (4, 1)}''.</div>}}
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:* <code>Sort({(3, 2), (2, 5), (4, 1)}) </code> gives you ''{(2, 5), (3, 2), (4, 1)}''.</div>}}
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; Sort( <Values>, <Keys> ): Sorts the first list ''Values'' according to the corresponding second list ''Keys''.
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:{{Examples|1=<div>
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:* In order to sort a list of polynomials <code>list1 = {x^3, x^2, x^6}</code>  according to degree, create the dependent list of degrees <code>list2 = Zip(Degree(a), a, list1)</code>. After that, <code> Sort(list1, list2)</code> yields the requested ''list3 = {x^2, x^3, x^6}''.
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:* In order to draw the polygon having as vertices the complex roots of <math>x^{10}-1</math>, sorted by their arguments, create <code>list1 = {ComplexRoot(x^10-1)}</code>,  then use the command <code>Polygon(Sort(list1, arg(list1)))</code>. This command yields ''poly1 = 2.94''.</div>}}
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{{note|There is a workaround to sort lists of arbitrary objects which is explained in the [[Tutorial:Advanced List Sorting]].}}

Revision as of 10:55, 6 October 2017


Sort( <List> )
Sorts a list of numbers, text objects, or points.
Note: Lists of points are sorted by x-coordinates.
Examples:
  • Sort({3, 2, 1}) gives you the list {1, 2, 3}.
  • Sort({"pears", "apples", "figs"}) gives you the list elements in alphabetical order.
  • Sort({(3, 2), (2, 5), (4, 1)}) gives you {(2, 5), (3, 2), (4, 1)}.


Sort( <Values>, <Keys> )
Sorts the first list Values according to the corresponding second list Keys.
Examples:
  • In order to sort a list of polynomials list1 = {x^3, x^2, x^6} according to degree, create the dependent list of degrees list2 = Zip(Degree(a), a, list1). After that, Sort(list1, list2) yields the requested list3 = {x^2, x^3, x^6}.
  • In order to draw the polygon having as vertices the complex roots of x^{10}-1, sorted by their arguments, create list1 = {ComplexRoot(x^10-1)}, then use the command Polygon(Sort(list1, arg(list1))). This command yields poly1 = 2.94.


Note: There is a workaround to sort lists of arbitrary objects which is explained in the Tutorial:Advanced List Sorting.
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