[R] R not giving significance tests for coefficients/estimates?

[B77S]

> 3x4
Error: unexpected symbol in "3x4"

R has no idea that you equate "x" as multiplication.. use an astrix

> 3*4
[1] 12




dominic wrote
> 
> This is basically my code: 
> 
> library(MASS)
> lmsreg(formula = b0 ~ b1 + b3 + b1xb2, data=mydata) 
> 
> b1xb2 is an interaction but it was the centered value for a continuous
> variable times a categorical variable. 
> 
> I am used to using Mplus statistical software and SAS for robust
> regression, and they'll usually give you a t-test, p-value as well as the
> SE and/or CI. But I am not getting it here even though I have sent that is
> the correct code to get it on some websites that have posted their output.
> I
> 
> I have also tried: 
> 
>  library(MASS)
>  lqs(formula = b0 ~ b1 + b3 + b1xb2, data=mydata,
> + method = c("lqs"))
> 
> And rlm(formula ...) too, but neither provide tests of significance. 
> 
> Am I doing something wrong? Any help on this matter is greatly
> appreciated. 
> 
> Thanks, 
> 
> Dominic
> 


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