adaptive sine-taper SPOD

adaptive sine-taper SPOD code incl. example and new dataset

tcoeffs and reconstruction from local coefficients

• scaling issue in tcoeffs resolved
• example 7 contains code to reconstruct from continuously-discrete temporal expansion coefficients (requested but does not make sense for most applications; use invspod instead)

tcoeffs update

• tcoeffs updated to new way of (not) handling FFT symmetry in spod.m

Multitaper estimates and inverse SPOD

• [L,P,F,Lc,A] = SPOD(...) returns the block-wise expansion coefficients in A
• Multitaper-Welch estimates can now be computed with the syntax SPOD(X,[NFFT BW],...)
• INVSPOD(P,A,WINDOW,NOVLP) uses A to reconstruct the original data from the SPOD
• example_8_invspod.m demonstrates Band-pass filtering using (inverse) SPOD
• example_9_multitaperWelch demonstrates SPOD using Multitaper-Welch estimators
• plus some minor cosmetic changes