i={0,1}
unset y2tics
set grid
set multiplot
set size .5,.5
set origin 0,.5
plot [fmin:fmax] [.99:1.01] 'zero.dat' u ($0*fsamp/fftlen):9 t '|Cll|' w l, \
                 'zero.dat' u ($0*fsamp/fftlen):15 t '|Crr|' w l 
set origin 0,0
plot [fmin:fmax] [-1:1] 'zero.dat' u ($0*fsamp/fftlen):10 t 'arg Cll []' w l, \
                 'zero.dat' u ($0*fsamp/fftlen):16 t 'arg Crr []' w l 
set origin .5,.5
plot [fmin:fmax] [-.01:.01] 'zero.dat' u ($0*fsamp/fftlen):11 t '|Clr|' w l, \
                   'zero.dat' u ($0*fsamp/fftlen):13 t '|Crl|' w l 
set origin .5,0
plot [fmin:fmax] [-180:180] 'zero.dat' u ($0*fsamp/fftlen):(180/pi*arg($3+$4*i)) t 'arg Clr []' w p pt 0, \
                   'zero.dat' u ($0*fsamp/fftlen):(180/pi*arg($5+$6*i)) t 'arg Crl []' w p pt 0 
unset multiplot

