Inverse maximal overlap discrete wavelet transform

uses
the reflection boundary condition in the reconstruction. If you specify `xrec`

= imodwt(___,'reflection')`'reflection'`

, `imodwt`

assumes
that the length of the original signal length is one half the number
of columns in the input coefficient matrix. By default, ` imodwt`

assumes
periodic signal extension at the boundary.

[1] Percival, D. B., and A. T. Walden. *Wavelet
Methods for Time Series Analysis*. Cambridge, UK: Cambridge
University Press, 2000.