Extract the derivatives of an object
getDerivs(x, ...)# S3 method for parvec
getDerivs(x, ...)
# S3 method for prdframe
getDerivs(x, ...)
# S3 method for prdlist
getDerivs(x, ...)
# S3 method for list
getDerivs(x, ...)
# S3 method for objlist
getDerivs(x, ...)
object from which the derivatives should be extracted
additional arguments (not used right now)
The derivatives in a format that depends on the class of x.
This is
parvec -> matrix,
prdframe -> prdframe,
prdlist -> prdlist,
objlist -> named numeric.