On 06/09/2009 1:04 PM, Peng Yu wrote:
Hi,
I thought that 'coefficients' is a named list, but I can not refer to
its element by something like r$coefficients$y. I used str() to check
r. It says the following. Can somebody let me know what it means?
The line that matters is the one
$ coefficients : Named num [1:2] 1.12e-15 1.00
It says that coefficients is a numeric ("num") vector, not a list. So
r$coefficients["y"] will extract the y coefficient.
Duncan Murdoch
..- attr(*, "names")= chr [1:2] "(Intercept)" "y"
$ Rscript lm.R
x=1:10
y=1:10
r=lm(x~y)
class(r)
[1] "lm"
mode(r)
[1] "list"
r
Call:
lm(formula = x ~ y)
Coefficients:
(Intercept) y
1.123e-15 1.000e+00
r$coefficients[1]
(Intercept)
1.123467e-15
r$coefficients[[1]]
[1] 1.123467e-15
r$coefficients[2]
y
1
r$coefficients[[2]]
[1] 1
str(r)
List of 12
$ coefficients : Named num [1:2] 1.12e-15 1.00
..- attr(*, "names")= chr [1:2] "(Intercept)" "y"
Regards,
Peng
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