Number of cells in a histogram

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Description

Computes the number of cells in a histogram using the method of Wand (1994).

Usage

1
   nclass.wand(x, level = 1)

Arguments

x

numeric vector of observations.

level

integer specifying the number of levels of functional estimation used in the estimation. For details, see the help page of dpih from the package KernSmooth.

Details

nclass.wand calls dpih, and then computes the number of cells corresponding to the optimal bin width returned by dpih.

Value

A numeric value specifying the number of cells for the histogram of x.

References

Wand, M.P. (1997). Data-based choice of histogram bin width. American Statistician, 51, 59–64.

See Also

denspr

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