[R-sig-eco] Manually calculate residuals

[Johannes Radinger]

Hello,

I have a dataset like:

dataframe(y,x1,x2,x3)

and I know a given (external) regression with its
parameter estimates like:

y = Intercept + b1*x1 + b2*x2 + b3*x3

Now I'd like to manually calculate the residuals
of my "new" data based on the given (external) regression.

Is there any built in function of R for doing that
(not resid()) or do I have to manually calculate fitted values
and then residuals for each dataset?

best regards,
Johannes
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