Program sfseisxwell | Select seismic data cross well position. 
[SYNOPSIS]
sfseisxwell < in.rsf > out.rsf path=spath.rsf well=well.rsf wx= wy= nw=0
[PARAMETERS]
int     | nw | =0 |   | 	number of well points 
string  | path | = |   | 	auxiliary output file name
string  | well | = |   | 	auxiliary input file name
floats  | wx | = |   | 	well x coordinates  [nw]
floats  | wy | = |   | 	well y coordinates  [nw]
[DIRECTORY]
user/yliu
