sampling a strain-rate tensor single component
 

Hello everybody, I just wonder if it is possible to use the sample function to obtain some values (over a gift line) of the xy component of the strain-rate tensor. I have already modified the stressComponents post-processing utility to map all the components on the computational domain (so i can plot one or more of them by using paraview), but what I actually need is to obtain the numerical values in order to plot them with applications such gnuplot or excel. Can someone give me a little help?

Thank you in advance