modes {<modes-statement>} end
<modes-statement> :==
Within a group the following is calculated between all atoms:
s[i,j]=<D[i]*D[j]>
where D is the coordinate displacement with respect to the average
D={(x1,y1,z1),(x2,y2,z2),.....(xn,yn,zn).
ascii=<logical>
Input trajectory is formatted rather than binary. Default=false
Several input files may be specified. Files are read in the
order given. Begin, skip, stop are all in integration units.