error code trying to extract second column from coeftest output

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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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.
---------------------------------------------------------------------------
Jeff Newmiller                        The     .....       .....  Go Live...
DCN:<jdnewmil at dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live Go...
                                      Live:   OO#.. Dead: OO#..  Playing
Research Engineer (Solar/Batteries            O.O#.       #.O#.  with
/Software/Embedded Controllers)               .OO#.       .OO#.  rocks...1k
--------------------------------------------------------------------------- 
Sent from my phone. Please excuse my brevity.

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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Hi
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?
See what is structure of coeftest object by

str(coeftest(lmodT_WBHO))

and from this you shall deduct how to select second column.

Regards
Petr

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

--
View this message in context: http://r.789695.n4.nabble.com/error-code-
trying-to-extract-second-column-from-coeftest-output-tp4630298.html
Sent from the R help mailing list archive at Nabble.com.

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide 
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.