Difference between revisions of "Sum Command"

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<noinclude>{{Manual Page|version=4.2}}</noinclude>
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<noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|cas=true|statistics}}
{{command|cas=true|statistics}}
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;Sum( <List> )
;Sum[ <List> ]
 
 
:Calculates the sum of all list elements.
 
:Calculates the sum of all list elements.
 
:{{examples|1=<div>
 
:{{examples|1=<div>
:* <code><nowiki>Sum[{1, 2, 3}]</nowiki></code> yields the number ''a = 6''.
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:* <code><nowiki>Sum({1, 2, 3})</nowiki></code> yields the number ''a = 6''.
:* <code><nowiki>Sum[{x^2,  x^3}]</nowiki></code> yields ''f(x) = x<sup>2</sup> + x<sup>3</sup>''.
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:* <code><nowiki>Sum({x^2,  x^3})</nowiki></code> yields ''f(x) = x<sup>2</sup> + x<sup>3</sup>''.
:* <code><nowiki>Sum[Sequence[ i, i, 1, 100 ]]</nowiki></code> yields the number ''a = 5050''.
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:* <code><nowiki>Sum(Sequence(i, i, 1, 100))</nowiki></code> yields the number ''a = 5050''.
:* <code><nowiki>Sum[{(1, 2), (2, 3)}]</nowiki></code> yields the point ''A = (3, 5)''.
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:* <code><nowiki>Sum({(1, 2), (2, 3)})</nowiki></code> yields the point ''A = (3, 5)''.
:* <code><nowiki>Sum[{(1, 2), 3}]</nowiki></code> yields the point ''B = (4, 5)''.
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:* <code><nowiki>Sum({"a", "b", "c"})</nowiki></code> yields the text ''"abc"''.</div>}}
:* <code><nowiki>Sum[{"a", "b", "c"}]</nowiki></code> yields the text ''"abc"''.</div>}}
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;Sum( <List>, <Number of Elements> )
;Sum[ <List>, <Number of Elements> ]
 
 
:Calculates the sum of the first ''n'' list elements.  
 
:Calculates the sum of the first ''n'' list elements.  
:{{example| 1=<div><code>Sum[{1, 2, 3, 4, 5, 6}, 4]</code> yields the number ''a = 10''.</div>}}
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:{{example| 1=<div><code>Sum({1, 2, 3, 4, 5, 6}, 4)</code> yields the number ''a = 10''.</div>}}
;Sum[ <List>, <List of Frequencies> ]
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;Sum( <List>, &lt;List of Frequencies> )
 
:Returns the sum of given list of numbers considering the frequencies.
 
:Returns the sum of given list of numbers considering the frequencies.
:{{example|1=<div><code><nowiki>Sum[{1, 2, 3, 4, 5}, {3, 2, 4, 4, 1}]</nowiki></code> yields ''a = 40''.</div>}}
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:{{example|1=<div><code><nowiki>Sum({1, 2, 3, 4, 5}, {3, 2, 4, 4, 1})</nowiki></code> yields ''a = 40''.</div>}}
{{note| 1=These commands work for numbers, points, vectors, text, and functions.}}
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{{note| 1=This command works for numbers, points, vectors, text, and functions.}}
 
==CAS Syntax==
 
==CAS Syntax==
;Sum[ <List> ]
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The following command only works in the [[File:Menu view cas.svg|link=|16px]] [[CAS View]].
:Calculates the sum of all list elements.
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:{{examples|1=<div>
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;Sum( <Expression>, <Variable>, <Start Value>, <End Value> )
:* <code><nowiki>Sum[{1, 2, 3}]</nowiki></code> yields ''6''.
 
:* <code><nowiki>Sum[{a, b, c}]</nowiki></code> yields ''a + b + c''.</div>}}
 
;Sum[ <Expression>, <Variable>, <Start Value>, <End Value> ]
 
 
:Computes sum <math>\sum_{t=Start Value}^{End Value}f(t)</math>. End value might be infinity.
 
:Computes sum <math>\sum_{t=Start Value}^{End Value}f(t)</math>. End value might be infinity.
 
:{{examples|1=<div>
 
:{{examples|1=<div>
:* <code><nowiki>Sum[i^2, i, 1, 3]</nowiki></code>  yields ''14''.
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:* <code><nowiki>Sum(n^2, n, 1, 3)</nowiki></code>  yields ''14''.
:* <code><nowiki>Sum[r^i, i, 0, n]</nowiki></code>  yields ''<math>\frac{r^{n+1} }{r - 1} - \frac{1}{r - 1}</math>''.
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:* <code><nowiki>Sum(r^k, k, 0, n)</nowiki></code>  yields ''<math>\frac{r^{n+1} }{r - 1} - \frac{1}{r - 1}</math>''.
:* <code><nowiki>Sum[(1/3)^i, i, 0, Infinity]</nowiki></code>  yields ''<math>\frac{3}{2}</math>''.</div>}}
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:* <code><nowiki>Sum((1/3)^n, n, 0, Infinity)</nowiki></code>  yields ''<math>\frac{3}{2}</math>''.</div>}}

Latest revision as of 14:26, 2 December 2021


Sum( <List> )
Calculates the sum of all list elements.
Examples:
  • Sum({1, 2, 3}) yields the number a = 6.
  • Sum({x^2, x^3}) yields f(x) = x2 + x3.
  • Sum(Sequence(i, i, 1, 100)) yields the number a = 5050.
  • Sum({(1, 2), (2, 3)}) yields the point A = (3, 5).
  • Sum({"a", "b", "c"}) yields the text "abc".
Sum( <List>, <Number of Elements> )
Calculates the sum of the first n list elements.
Example:
Sum({1, 2, 3, 4, 5, 6}, 4) yields the number a = 10.
Sum( <List>, <List of Frequencies> )
Returns the sum of given list of numbers considering the frequencies.
Example:
Sum({1, 2, 3, 4, 5}, {3, 2, 4, 4, 1}) yields a = 40.
Note: This command works for numbers, points, vectors, text, and functions.

CAS Syntax

The following command only works in the Menu view cas.svg CAS View.

Sum( <Expression>, <Variable>, <Start Value>, <End Value> )
Computes sum \sum_{t=Start Value}^{End Value}f(t). End value might be infinity.
Examples:
  • Sum(n^2, n, 1, 3) yields 14.
  • Sum(r^k, k, 0, n) yields \frac{r^{n+1} }{r - 1} - \frac{1}{r - 1}.
  • Sum((1/3)^n, n, 0, Infinity) yields \frac{3}{2}.
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