It looks like your data has not enough information to estimate the parameter for metaCl. Maybe because metaCL is identical to one of the other variables or a constant. HTH,
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 thierry.onkel...@inbo.be www.inbo.be To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher The plural of anecdote is not data. ~ Roger Brinner The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey -----Oorspronkelijk bericht----- Van: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Namens Bob Gotwals Verzonden: donderdag 26 februari 2009 13:59 Aan: r-help@r-project.org Onderwerp: [R] Singularity in a regression? R friends, In a matrix of 1s and 0s, I'm getting a singularity error. Any helpful ideas? lm(formula = activity ~ metaF + metaCl + metaBr + metaI + metaMe + paraF + paraCl + paraBr + paraI + paraMe) Residuals: Min 1Q Median 3Q Max -4.573e-01 -7.884e-02 3.469e-17 6.616e-02 2.427e-01 Coefficients: (1 not defined because of singularities) Estimate Std. Error t value Pr(>|t|) (Intercept) 7.9173 0.1129 70.135 < 2e-16 *** metaF -0.3973 0.2339 -1.698 0.115172 metaCl NA NA NA NA metaBr 0.3454 0.1149 3.007 0.010929 * metaI 0.4827 0.2339 2.063 0.061404 . metaMe 0.3654 0.1149 3.181 0.007909 ** paraF 0.7675 0.1449 5.298 0.000189 *** paraCl 0.3400 0.1449 2.347 0.036925 * paraBr 1.0200 0.1449 7.040 1.36e-05 *** paraI 1.3327 0.2339 5.697 9.96e-05 *** paraMe 1.2191 0.1573 7.751 5.19e-06 *** --- Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 Residual standard error: 0.2049 on 12 degrees of freedom Multiple R-squared: 0.9257, Adjusted R-squared: 0.8699 F-statistic: 16.61 on 9 and 12 DF, p-value: 1.811e-05 ______________________________________________ R-help@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. Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver weer en binden het INBO onder geen enkel beding, zolang dit bericht niet bevestigd is door een geldig ondertekend document. The views expressed in this message and any annex are purely those of the writer and may not be regarded as stating an official position of INBO, as long as the message is not confirmed by a duly signed document. ______________________________________________ R-help@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.
