Dear R-help,
This is my first R day. I want to ask some more beginner's questions.
Q1. How can I obtain the covariance matrix for parameter estimates of a multiple regression? I checked ?lm but didn't get the information.
Q2. How can I see the old graphs in the graph window?
Q3. Can R plot animated graph? For example, I want to see the dynamic change of a 2D graph during a time period.
Thanks in advance!
Yung-jui Yang
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