Synopsis
		sflpf < dat.rsf match=mat.rsf > flt.rsf pred=pre.rsf niter=100 verb=y pef= lag=

July 2019 program of the month:
http://ahay.org/blog/2019/07/09/program-of-the-month-sflpf/

Parameters
		string lag= file with PEF lags (optional)   file match= auxiliary input file name   int niter=100 number of iterations   string pef= signal PEF file (optional)   string pred= auxiliary output file name   bool verb=y [y/n] verbosity flag

Used In
		DATA          cant12/lpf cant12/stk   GEO384H          hw5/pattern   JLU          riesz/linefit spefdecon/rdata spefdecon/wedge   SEP          stack/velinv   TCCS          lpf/lpf lpf/plut lpf/ray lpf/regr lpf/simon nar/trace pi/bei pi/simple-model