input=tfile_test
input2=tfile_test_ti

subset <$input n1=501 n2=185 n3=175 n3s=1 ix3s=$1 |
xcontour n1=501 n2=185 d1=0.005 d2=50 fc=0 nc=41 dc=0.1 title="isotropic" &

subset <$input2 n1=501 n2=185 n3=175 n3s=1 ix3s=$1 |
xcontour n1=501 n2=185 d1=0.005 d2=50 fc=0 nc=41 dc=0.1 title="TI" &