[R] mblm, confint problem

[Kay Cichini]

hello,

i did median based linear regression and computed conf.intervals for my
coefficients.
but something must have went wrong as the estimates are out of estimates
confidence bounds.
does someone know what is the problem here.

i get warning messages about wilcox.test is not able to do calculations of
exact p-values with ties and zeroes, but i do not expect the estimates and
theire ci's to be effected by this...

i'd be glad if someone could give advise,
greetings,
kay


library(mblm)

y<-c(1.41421356237310, 2, 2.44948974278318, 0, 1.41421356237310, 
2, 0, 1.41421356237310, 1.41421356237310, 1.73205080756888, 2, 
1.41421356237310, 2.44948974278318, 1, 1.41421356237310, 3.16227766016838, 
0, 1.41421356237310, 1.41421356237310, 1.41421356237310, 1, 1, 
3, 1, 0)

x<-c(1.73205080756888, 2.23606797749979, 2.82842712474619, 
1.41421356237310, 2.23606797749979, 2.44948974278318, 1, 1,
2.64575131106459, 
2, 3.16227766016838, 2.23606797749979, 3.16227766016838, 2.64575131106459, 
2.23606797749979, 3.16227766016838, 1, 1.73205080756888, 0,
1.73205080756888, 
0, 1.41421356237310, 3.16227766016838, 0, 1)

mod<-mblm(y~x,repeated=F)
summary(mod)

mod$coeff
confint(mod)

# gives:

> mod$coeff
(Intercept)           x 
  0.3187684   0.6324555 
> 
> confint(mod)
                  0.025        0.975
(Intercept) -0.02332502 0.5550533
x                0.77481683 1.0266857          (?????)





-----
------------------------
Kay Cichini
Postgraduate student
Institute of Botany
Univ. of Innsbruck
------------------------

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