Difference between revisions of "Array-reducing functions"

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An array-reducing function operates across a dimension of an array and returns a result that has one dimension less than the number of dimensions of its input array. When applied to an array of <code>n</code> dimensions, a reducing function produces an array that contains <code>n-1</code> dimensions. Examples include, '''Sum(x, i)''', Product(x,i), Max(x, i), Min(x, i)''', and others described below. The subscript construct '''x[i = v]''' and related subscript and slice functions also reduce arrays by a dimension (see [[Subscript and slice of a subarray]]).
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The function '''Sum(x, i)''' illustrates some properties of reducing functions.
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'''Examples'''
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<code>Sum(Car_prices, Car_type) →</code>
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<code>Variable Rate_of_inflation :=</code>
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{| class=''wikitable'' border="1"
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! colspan="5" style="text-align: left;" | Years &#9654;
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|-
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! style="width:75px;" |'''2005            '''
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! style="width:75px;" |'''2006            '''
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! style="width:75px;" |'''2007            '''
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! style="width:75px;" |'''2008            '''
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! style="width:75px;" |'''2009            '''
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|-
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| 59K
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| 62K
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| 66K
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| 71K
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| 76K
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|}
  
 
==See Also==
 
==See Also==
 
<footer>Functions that create arrays / {{PAGENAME}} / Transforming functions</footer>
 
<footer>Functions that create arrays / {{PAGENAME}} / Transforming functions</footer>

Revision as of 03:11, 11 December 2015

Analytica User GuideMore Array FunctionsArray-reducing functions

An array-reducing function operates across a dimension of an array and returns a result that has one dimension less than the number of dimensions of its input array. When applied to an array of n dimensions, a reducing function produces an array that contains n-1 dimensions. Examples include, Sum(x, i), Product(x,i), Max(x, i), Min(x, i), and others described below. The subscript construct x[i = v] and related subscript and slice functions also reduce arrays by a dimension (see Subscript and slice of a subarray).

The function Sum(x, i) illustrates some properties of reducing functions.

Examples

Sum(Car_prices, Car_type) →

Variable Rate_of_inflation :=

Years ▶
2005 2006 2007 2008 2009
59K 62K 66K 71K 76K

See Also

Functions that create arraysArray-reducing functionsTransforming functions
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