[R] a nls question

[Chung Chang]

Hi,
   I have a question about how to get the residuals and estimations
of the parameters in my program.
For example,
x<-c(1,2,3,4,5,6)
y<-c(2.9, 1.24, 1.71, 2.989358, 1.455979, 1.4)
nls(y ~ a+sin(b*x),start=list(a=2.2,b=1.8),trace=TRUE)
I can get the estimation of a, b and residuals from the output but I
need them to be vectors in order to do futhur calculations in a
program. Is there any options for this function nls similar to
lm$coefficients and lm$residuals which I can get vectors of
estimation and residuals?
Thanks very much for your help

Chung