ot enabled for &quot;angle coeff&quot; command
               must be specified in data file (see &quot;read data&quot; command)
          charmm
               (1) K (energy units)
               (2) theta (degrees)
               (3) K_UB (energy/distance^2)
               (4) r_UB (distance)
          cosine
               (1) K (energy units)

define (or override) angle coefficients for an individual angle type
use appropriate number of coeffs for a particular style
see force_fields.html for meaning of 