[R] error code trying to extract second column from coeftest output

[Jeff Newmiller]

I recommend that you troubleshoot your own problem using the str function... for example, str( coeftest(lmodT_WBHO)). The error message is not a "code"... it is perfectly readable English, and it is telling you that the result of calling coeftest is not a list with parts that can be pulled out using the $ operator.
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rl269 <rlisi at acad.umass.edu> wrote:

>I want to use the standard error values in the summary that is produced
>using
>coeftest, but I am getting an error code- any ideas?
>
>> library(lmtest)
>> coeftest(lmodT_WBHO)
>
>t test of coefficients:
>
>    Estimate Std. Error t value  Pr(>|t|)    
>t1W  5.94819    0.17072 34.8410 < 2.2e-16 ***
>t2W  6.56216    0.17438 37.6322 < 2.2e-16 ***
>t3W  6.08252    0.16525 36.8082 < 2.2e-16 ***
>t4W  6.18041    0.17028 36.2949 < 2.2e-16 ***
>t1B  5.50000    0.50566 10.8768 < 2.2e-16 ***
>t2B  5.65000    0.53034 10.6535 < 2.2e-16 ***
>t3B  4.52381    0.51756  8.7406 < 2.2e-16 ***
>t4B  4.38095    0.51756  8.4646 < 2.2e-16 ***
>t1H  5.05000    0.53034  9.5221 < 2.2e-16 ***
>t2H  4.77778    0.55903  8.5465 < 2.2e-16 ***
>t3H  5.52632    0.54412 10.1564 < 2.2e-16 ***
>t4H  4.71429    0.63388  7.4372 2.236e-13 ***
>t1O  5.17647    0.57524  8.9988 < 2.2e-16 ***
>t2O  5.81818    0.50566 11.5060 < 2.2e-16 ***
>t3O  6.50000    0.63388 10.2543 < 2.2e-16 ***
>t4O  5.71429    0.63388  9.0147 < 2.2e-16 ***
>---
>Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 
>
>> se1 <- coeftest(lmodT_WBHO)$coef[,2]
>Error in coeftest(lmodT_WBHO)$coef : 
>  $ operator is invalid for atomic vectors
>> 
>
>
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