[R] meaning of sigma from LM, is it the same as RMSE

[John Sorkin]

Please forgive my re-sending this question. I did not see any replies from my prior post. My apologies if I missed something.

Is the sigma from a lm, i.e.

fit1 <- lm(y~x)
summary(fit1)
summary(fit1)$sigma

the RMSE (root mean square error)

Thanks,
John

John David Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)

Confidentiality Statement:
This email message, including any attachments, is for th...{{dropped:6}}