On Nov 14, 2011, at 10:49 PM, Miles Yang wrote:
Hi all,
I wrote a r program as below:
x <- 1:10
y <- c(3,3,3,3,3,3,3,3,3,3)
fit <- lm(log(y) ~ x)
summary(fit)
And I expect to get some error message from R, because "y" is
constant.
But, I got the message as below:
You are asking R to tell you if the mean of the log of 3 was different
than 0. It is.
--
David.
summary(fit)
Call:
lm(formula = log(y) ~ x)
Residuals:
Min 1Q Median 3Q Max
-6.802e-17 -3.933e-17 -1.063e-17 1.807e-17 1.530e-16
Coefficients:
Estimate Std. Error t value Pr(>|t|)
(Intercept) 1.099e+00 4.569e-17 2.404e+16 <2e-16 ***
x -1.275e-17 7.364e-18 -1.732e+00 0.122
---
Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
Residual standard error: 6.688e-17 on 8 degrees of freedom
Multiple R-squared: 0.5794, Adjusted R-squared: 0.5269
F-statistic: 11.02 on 1 and 8 DF, p-value: 0.01054
How could this be possible?
Did I missing something in my R code?
Best,
Miles
--
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Miles Yang
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E-mail：miles2y...@gmail.com
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