Constructs the wavelet filter to be used.
select_filter(filter_name)A String that must receive: "haar".
info A field<vec> that contains:
"L"A integer specifying the length of the filter
"h"A vector containing the coefficients for the wavelet filter
"g"A vector containing the coefficients for the scaling filter
The package is oriented toward using only the haar filter. If the package extends at a later time, then the supporting infrastructure is there.