IDL Wavelet Toolkit User's Guide
IDL Wavelet Toolkit User's Guide
IDL Wavelet Toolkit User's Guide
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Chapter 4: <strong>IDL</strong> <strong>Wavelet</strong> <strong>Toolkit</strong> Reference 93WV_FN_SYMLETThe WV_FN_SYMLET function constructs wavelet coefficients for the Symletwavelet function.NoteThe Symlet wavelet for orders 1–3 are the same as the Daubechies wavelets of thesame order.SyntaxResult = WV_FN_SYMLET( [Order, Scaling, <strong>Wavelet</strong>, Ioff, Joff] )Return ValueThe returned value of this function is an anonymous structure of information aboutthe particular wavelet.Tag Type DefinitionFAMILY STRING ‘Symlet’ORDER_NAME STRING ‘Order’ORDER_RANGE INTARR(3) [1, 15, 4] Valid order range [first, last, default]ORDER INT The chosen OrderDISCRETE INT 1 [0=continuous, 1=discrete]ORTHOGONAL INT 1 [0=nonorthogonal, 1=orthogonal]SYMMETRIC INT 2 [0=asymmetric, 1=symm., 2=near symm.]SUPPORT INT 2*Order – 1 [Compact support width]MOMENTS INT Order [Number of vanishing moments]REGULARITY DOUBLE The number of continuous derivativesTable 4-12: Structure Tags for Result<strong>IDL</strong> <strong>Wavelet</strong> <strong>Toolkit</strong>WV_FN_SYMLET
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