Definition:Lowess

Definition

Lowess is a technique for fitting a smooth curve to a large data set that is resistant to outliers.

It is an extension of the concept of a weighted moving average as used in time series analysis.

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Also known as

Lowess is also known as loess.

However, the latter term can cause confusion with the technique which is a modification of lowess proper that does not involve the separate process for reducing the influence of outliers.

Also see

• Definition:Loess

• Results about lowess can be found here.

Historical Note

The lowess technique was initially developed in $1979$ by William Swain Cleveland.

Linguistic Note

The word lowess is an acronym for locally weighted scatterplot smoothing.

Sources

• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): lowess