WV_FN_HAAR

IDL Wavelet Toolkit User's Guide: IDL Wavelet Toolkit Reference

The WV_FN_HAAR function constructs wavelet coefficients for the Haar wavelet function.

Note
The Haar wavelet is the same as the Daubechies wavelet of order 1.

Result = WV_FN_HAAR( [Order, Scaling, Wavelet, Ioff, Joff] )

The returned value of this function is an anonymous structure of information about the particular wavelet.

Table 4-9: Structure Tags for Result

Table 4-9: Structure Tags for Result
Tag	Type	Definition
FAMILY	STRING	`Haar'
ORDER_NAME	STRING	`Order'
ORDER_RANGE	INTARR(3)	[1, 1, 1] Valid order range [first, last, default]
ORDER	INT	1
DISCRETE	INT	1 [0=continuous, 1=discrete]
ORTHOGONAL	INT	1 [0=nonorthogonal, 1=orthogonal]
SYMMETRIC	INT	0 [0=asymmetric, 1=symm., 2=near symm.]
SUPPORT	INT	1 [Compact support width]
MOMENTS	INT	1 [Number of vanishing moments]
REGULARITY	DOUBLE	0d [Number of continuous derivatives]

A scalar that specifies the order number for the wavelet. The default is 1.

On output, contains a vector of double-precision scaling (father) coefficients.

On output, contains a vector of double-precision wavelet (mother) coefficients.

On output, contains an integer that specifies the support offset for Scaling.

On output, contains an integer that specifies the support offset for Wavelet.

Note
If none of the above arguments are present then the function will simply return the Result structure using the default Order.

None.

Daubechies, I., 1992: Ten Lectures on Wavelets, SIAM.


5.3	Introduced