crch.control  R Documentation 
Auxiliary function for crch
fitting. Specifies a list of values passed
to optim
.
crch.control(method = "BFGS", maxit = NULL, hessian = NULL,
trace = FALSE, start = NULL, dot = "separate",
lower = Inf, upper = Inf, ...)
method 
optimization method passed to 
maxit 
the maximum number of iterations. Default is 5000 except for

hessian 
logical or NULL. If TRUE the numerical Hessian matrix from the

trace 
nonnegative integer. If positive, tracing information on the progress of the optimization is produced. 
start 
initial values for the parameters to be optimized over. 
dot 
character specifying how to process formula parts with a dot
( 
lower , upper 
bounds on the variables for the 
... 
additional parameters passed to 
A list with components named as the arguments.
crch
, optim
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