Difference between revisions of "Cumulate"
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[[Category:Transforming functions]] | [[Category:Transforming functions]] | ||
[[Category:Doc Status C]] <!-- For Lumina use, do not change --> | [[Category:Doc Status C]] <!-- For Lumina use, do not change --> | ||
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| + | = Cumulate(X,I) = | ||
Returns an array with each element being the sum of all of the elements of X along dimension I up to, and including, the corresponding element of X. | Returns an array with each element being the sum of all of the elements of X along dimension I up to, and including, the corresponding element of X. | ||
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Cumulate(X:Array[I] ; I : Index) | Cumulate(X:Array[I] ; I : Index) | ||
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| + | = Library = | ||
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| + | Array Functions | ||
= Examples = | = Examples = | ||
Revision as of 15:54, 30 October 2008
Cumulate(X,I)
Returns an array with each element being the sum of all of the elements of X along dimension I up to, and including, the corresponding element of X.
Declaration
Cumulate(X:Array[I] ; I : Index)
Library
Array Functions
Examples
| I → | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| X → | 8 | 2 | 0 | 5 | -3 | 7 |
| Cumulate(X,I) → | 8 | 10 | 10 | 15 | 12 | 19 |
Library
Array Functions
Notes
Recumulate
A useful variation is the Recumulate function, which resets the total to zero at selected points. This usage is:
Recumulate(x,b,I)
where b is an array of booleans indexed by I, having 1 at each point where the cumulation is to be reset to zero. Recumulate is implemented as a User-Defined Function in the example Recumulate example.ana. A clever usage of this function computes the number of time steps that the system has been in the same state (see the example).
See Also
Comments
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