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
${n}_{c}$ 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
$n$,
c09cbf will reconstruct the data array
${y}_{i}$, for
$\mathit{i}=1,2,\dots ,n$,
from which the coefficients were derived.
None.
If on entry
${\mathbf{ifail}}=0$ or
$-1$, 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.
None.