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FindDensityMaxima_FixedSpread


Module: FoundationPro

Finds local density maxima in a set of values by looking for the highest number of samples withing a range determined by the given spread.

Applications

Can be used to determine histogram's local maxima without actually creating the histogram.
Name Type Range Description
Input value
inValues RealArray Data points array
Input value
inSpread Real 0.0 - Maximum spread of a single window
Input value
inMinCount Integer 1 - Windows with a smaller count will not be considered
Input value
inAllowOverlapping Bool If true all local maxima will be returned otherwise for each group of ranges that overlap only the one with the smallest real spread will be returned
Input value
inCycle Real* Length of the cycle if data is to be considered cyclically
Input value
inModeFunction DataModeFunction Method of calculating the center of a data mode
Input value
inLocalBlindness LocalBlindness* Helps to sieve out unnecessary points
Output value
outModes RealArray Computed data modes
Output value
outCounts IntegerArray Sizes of windows that had a mode

Description

Find approximations of local density maxima in a data sample by looking for highest concentrations in a window with a bounded spread.

Overlapping windows (i.e. a series of windows with the same count) can be sieved if inAllowOverlapping is set to false. The sieving removes all modes that are shadowed by (i.e. are overlapping with) another mode with a smaller spread.

inMinCount and inLocalBlindness can be used to further filter out potentially unnecessary points in the output.

Errors

This filter can throw an exception to report error. Read how to deal with errors in Error Handling.

List of possible exceptions:

Error type Description
DomainError Empty array in FindDensityMaxima_FixedSpread.

Complexity Level

This filter is available on Advanced Complexity Level.

Filter Group

This filter is member of FindDensityMaxima filter group.

See Also

  • FindDataMode_FixedSpread – Finds the mode in a set of data values by looking for highest number of samples withing the specified spread.
  • FindDensityMaxima_FixedCount – Finds local density maxima in set of values by looking for the highest concentration of a fixed number of samples.