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2011 Aug 24
2
Regression by factor using "sapply"
...d like to perform a multiple regression on a single data set containing a
representation of energy consumption and temperatures containing account
number, usage (KWh), heating degree days (HDD) and cooling degree (CDD)
days. I want to get the coefficients back from the following equation:
lm(AvgKWh ~ AvgHDD + AvgCDD, data=usage)
Given that the data set contains the usage of different accounts (e.g. some
large energy users and some small energy users) I do not want to perform the
equation just one time. Instead, I want to re-calculate the coefficients
(and associated measures of goodness of...