C09CBF computes the inverse one-dimensional discrete wavelet transform (DWT) at a single level. The initialization routine C09AAF
must be called first to set up the DWT options.
C09CBF performs the inverse operation of C09CAF
. That is, given sets of
approximation coefficients and detail coefficients, computed by C09CAF
using a DWT as set up by the initialization routine C09AAF
, on a real data array of length
, C09CBF will reconstruct the data array
from which the coefficients were derived.
If on entry
, explanatory error messages are output on the current error message unit (as defined by X04AAF
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.