IDL Wavelet Toolkit User's Guide

66 Chapter 4: IDL Wavelet Toolkit ReferenceWV_CWTSyntaxThe WV_CWT function returns the one-dimensional continuous wavelet transformof the input array. The transform is done using a user-inputted wavelet function.Result = WV_CWT(Array, Family, Order [, /DOUBLE] [, DSCALE=scalar][, NSCALE=scalar] [, /PAD] [, SCALE=variable] [, START_SCALE=scalar])Return ValueThe result is a two-dimensional array of type complex or double complex, containingthe continuous wavelet transform of the input Array.ArgumentsArrayA one-dimensional array of length N, of floating-point or complex type.FamilyA scalar string giving the name of the wavelet function to use for the transform.OrderThe order number, or parameter, for the wavelet function given by Family.KeywordsDOUBLESet this keyword to force the computation to be done in double-precision arithmetic.DSCALESet this keyword to a scalar value giving the spacing between scale values, inlogarithmic units. The default is 0.25, which gives four subscales within each majorscale.WV_CWTIDL Wavelet Toolkit