0) makeFtable quad-1.ftable -energy=7000 -k1=1 -xmin=-0.02 -xmax=0.02 \
   -nx=41 -ymin=-0.02 -ymax=0.02 -ny=41 -zmin=0 -zmax=0.5 -nz=500

1) Calculate bend and FTABLE bend:
   elegant quad.ele

2) Process output:
   sddsplot -thick=2 -grap=sym,vary=sub,fill -title= \
      -col=x,y -leg=filename *.out \
      -dev=lpng -out=../ftable-quad.png

