[R] extracting Pr>ltl from robcov/ols (Design)
ldb
ldbren at gmail.com
Fri Jul 25 14:51:00 CEST 2008
I am trying to extract significance levels out of a robcov+ols call.
For background: I am analysing data where multiple measurements(2 per
topic) were taken from individuals(36) on their emotional reaction
(dependent variable) to various topics (3 topics). Because I have
several emotions and a rotation to do on the topics, I'd like to have
the results pumped into a nice table.
answer<-robcov(ols(emotion ~ topic,x=TRUE,y=TRUE),individual)
>From the robcov help it warns me:
>Adjusted ols fits do not have the corrected standard errors printed with print.ols. Use sqrt(diag(adjfit$var)) to get this, where adjfit is the result of robcov.
So I can get to the standard error by:
answer.se<-sqrt(diag(answer$var))
I can get to the coefficients by:
answer.co<-coefficients(answer)
I can get to the t-values by:
answer.t<-coefficients(answer)/ sqrt(diag(answer$var))#t-value
However, I can't figure out how to get to the significance (Pr>ltl).
It is obviously calculating it because the call:
answer
provides it, but I can't figure out where it is getting it from or how
it is calculating.
thanks for any help.
ldb
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