> 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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