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dtrend_quadratic

Estimates and removes the least squares quadratic trend of the rightmost dimension from all grid points.

Prototype

	function dtrend_quadratic (
		y       : numeric,  
		option  : integer   
	)

	return_val [dimsizes(y)] :  numeric

Arguments

y

A multi-dimensional array or scalar value equal to the data to be detrended. The dimension from which the trend is calculated needs to be the rightmost dimension. This is usually time. Missing values are not allowed. Use dtrend_quadratic_msg_n if missing values are present.

option

Currently not used (set to 0).

Return value

An array of the same size as y. Double if y is double, float otherwise.

Description

Estimates and removes the least squares quadratic trend of the rightmost dimension from all grid points. Missing values are not allowed.

See Also

dtrend_quadratic_msg_n, dtrend_msg_n, dtrend_msg, dtrend_n, dtrend

Examples

Example 1

y is three-dimensional with dimensions lat, lon, and time. The returned array will have the same size. Remember that the mean is also removed.

    yDtrend = dtrend_quadratic(y,0)