Load discrete prolate spheroidal sequences from database
[e,v] = dpssload(n,nw)
[e,v] = dpssload(n,nw) loads
all sequences with length n and time-bandwidth
product nw in the columns of e and
their corresponding concentrations in vector v from
the DPSS MAT-file database dpss.mat. Create the dpss.mat file
using dpssave.