Difference between revisions of "Shuffle"
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= Function Shuffle(a [, i]) =
 
= Function Shuffle(a [, i]) =
 
   
 
   
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Shuffle returns a random reordering (permutation) of the values in array a over index i. If you omit i, it shuffles over Run. [Since build 4.0.0.48.] You can use it generate an independent random sample from an existing probability distribution, a.   
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Shuffle returns a random reordering (permutation) of the values in array a over index i. If you omit i, it shuffles over Run. [Since build 4.0.0.48.] You can use it generate an independent random sample from an existing probability distribution, a.  If a contains dimensions other than i, it shuffles each slice over those other dimensions independently over i.
  
 
== Declaration ==
 
== Declaration ==
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  Shuffle(a: Array[i]; i: IndexType = Run)
 
  Shuffle(a: Array[i]; i: IndexType = Run)
  
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If a contains dimensions other than i, it shuffles each slice independently over those other dimensions.
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If you want to shuffle the slices of a multidimensional array over index i, without shuffling the values within each slice, use this method:
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If you want to shuffle the slices an array over index i, but not shuffle the values within each slice, use this method:
 
  
 
  A[@I = Shuffle(@I,I)]
 
  A[@I = Shuffle(@I,I)]
  
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This creates a shuffle of index I, and uses that to reshuffle the slices of A over I. It does not shuffle each slice of A over any indexes of A other than I.
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This shuffles A over index I, but does not shuffle each slice of A for each value of I.

Revision as of 22:06, 28 August 2007


What's new in Analytica 4.0? >

Function Shuffle(a [, i])

Shuffle returns a random reordering (permutation) of the values in array a over index i. If you omit i, it shuffles over Run. [Since build 4.0.0.48.] You can use it generate an independent random sample from an existing probability distribution, a. If a contains dimensions other than i, it shuffles each slice over those other dimensions independently over i.

Declaration

Shuffle(a: Array[i]; i: IndexType = Run)

If you want to shuffle the slices of a multidimensional array over index i, without shuffling the values within each slice, use this method: 

A[@I = Shuffle(@I,I)]

This shuffles A over index I, but does not shuffle each slice of A for each value of I.

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