# ucv

From MASS v7.3-51.4
by Brian Ripley

##### Unbiased Cross-Validation for Bandwidth Selection

Uses unbiased cross-validation to select the bandwidth of a Gaussian kernel density estimator.

- Keywords
- dplot

##### Usage

`ucv(x, nb = 1000, lower, upper)`

##### Arguments

- x
a numeric vector

- nb
number of bins to use.

- lower, upper
Range over which to minimize. The default is almost always satisfactory.

##### Value

a bandwidth.

##### References

Scott, D. W. (1992)
*Multivariate Density Estimation: Theory, Practice, and Visualization.*
Wiley.

Venables, W. N. and Ripley, B. D. (2002)
*Modern Applied Statistics with S.* Fourth edition. Springer.

##### See Also

##### Examples

```
# NOT RUN {
ucv(geyser$duration)
# }
```

*Documentation reproduced from package MASS, version 7.3-51.4, License: GPL-2 | GPL-3*

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