nag_imlmodwt (c09ddc) computes the inverse one-dimensional multi-level maximal overlap discrete wavelet transform (MODWT). This function reconstructs data from (possibly filtered or otherwise manipulated) wavelet transform coefficients calculated by
nag_mlmodwt (c09dcc) from an original set of data. The initialization function
nag_wfilt (c09aac) must be called first to set up the MODWT options.
nag_imlmodwt (c09ddc) performs the inverse operation of
nag_mlmodwt (c09dcc). That is, given a set of wavelet coefficients computed by
nag_mlmodwt (c09dcc) using a MODWT as set up by the initialization function
nag_wfilt (c09aac) on a real array of length
,
nag_imlmodwt (c09ddc) will reconstruct the data array
, for
, from which the coefficients were derived.
The accuracy of the wavelet transform depends only on the floating-point operations used in the convolution and downsampling and should thus be close to machine precision.
None.