[R] criterion for Iterative procedure

[vito muggeo]

Hi all,
I've written some function that is substantially an iterative call to glm()
where the linear predictor changes at each iteration with respect to just
one variable.
I used obj$dev as covergence criterion, i.e.:
epsilon<-abs((dev.old-dev.new)/dev.old)
    while(epsilon>toll).....

and I used cat(....) to see the trace of the process:
cat(iter=it,dev=dev.new, labels="iteration", fill=T)
[ Is there any best way to print this information? ]

Everything works but  with some dataset (really very little) I noted that
the deviance is not always a decreasing function, in sense that there some
iteration where the dev is smaller than one found when the algorithm attains
convergence.
Which solution have I to assume? Is it right to assume the solution when the
increment in deviance is negligible?
thanks for your help,

vito
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