It's not very clear to me but I think summary(mod)$coef[, "Std. Error"] is wat you need?
Cheers, Thierry ------------------------------------------------------------------------ ---- ir. Thierry Onkelinx Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology and quality assurance Gaverstraat 4 9500 Geraardsbergen Belgium tel. + 32 54/436 185 [EMAIL PROTECTED] www.inbo.be Do not put your faith in what statistics say until you have carefully considered what they do not say. ~William W. Watt A statistical analysis, properly conducted, is a delicate dissection of uncertainties, a surgery of suppositions. ~M.J.Moroney > -----Oorspronkelijk bericht----- > Van: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Namens Manuele Pesenti > Verzonden: dinsdag 24 juli 2007 12:03 > Aan: r-help@stat.math.ethz.ch > Onderwerp: [R] values from a linear model > > Dear R users, > how can I extrapolate values listed in the summary of an lm > model but not directly available between object values such > as the the standard errors of the calculated parameters? > > for example I got a model: > > mod <- lm(Crd ~ 1 + Week, data=data) > > and its summary: > > > summary(mod) > > Call: > lm(formula = Crd ~ 1 + Week, data = data, model = TRUE, y = TRUE) > > Residuals: > Min 1Q Median 3Q Max > -4.299e-03 -1.653e-03 2.628e-05 1.291e-03 5.130e-03 > > Coefficients: > Estimate Std. Error t value Pr(>|t|) > (Intercept) 1.000e+01 3.962e-04 25238.73 <2e-16 *** > Week 5.038e-04 6.812e-06 73.96 <2e-16 *** > --- > Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 > > Residual standard error: 0.001966 on 98 degrees of freedom > Multiple R-Squared: 0.9824, Adjusted R-squared: 0.9822 > F-statistic: 5469 on 1 and 98 DF, p-value: < 2.2e-16 > > I'm interested in values of Std. Error of coefficients... > > thank you very much > > Best regards > Manuele > > -- > Manuele Pesenti > [EMAIL PROTECTED] > [EMAIL PROTECTED] > http://mpesenti.polito.it > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > ______________________________________________ R-help@stat.math.ethz.ch 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.