             (1) K (energy units)
               (2) d (+1 or -1)
               (3) n (0,1,2,3,4,6)
          class2
               currently not enabled for &quot;improper coeff&quot; command
               must be specified in data file (see &quot;read data&quot; command)

define (or override) improper coefficients for an individual improper type
use appropriate number of coeffs for a particular style
see force_fields.html for meaning of coefficients for each style
these coefficients can also be set in d