Synopsis
		sflinear < in.rsf > out.rsf pattern=pattern.rsf sort=n niter=0 rect=1 nw=2 n1= d1= o1=

The input should have n2=2 (coordinates,values)

For output, specify either n1= o1= d1= or pattern=

March 2016 program of the month:
http://ahay.org/blog/2016/03/23/program-of-the-month-sflinear/

Parameters
		float d1= Output sampling   string n1= Output grid size   int niter=0 number of iterations   int nw=2 interpolator size   float o1= Output origin   string pattern= auxiliary input file name   int rect=1 smoothing regularization   bool sort=n [y/n] if y, the coordinates need sorting

Used In
		DATA          alaska/line31-81-m8r teapotdome/angmig teapotdome/canoren teapotdome/cmp_stack_tahstack teapotdome/nmostack teapotdome/scdecon teapotdome/vels teapotdome/zomig   GALLERY          teapot/angmig teapot/zomig   GEO384S          hw2/groundroll hw3/nmo3d   JLU          vdseislet/haskell   RSF          su/rsflab4   SEP          geostat/dix pefmult/haskell   TCCS          demulemd/haskell t2dweak/alaska