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.... I get the following error, although I've tried different penalties and different tolerances. The X matrix is scaled and centred. > library(Design) > load(url("http://www.csse.unimelb.edu.au/~gabraham/data2.Rdata")) > l <- lrm(y ~ X, penalty=100, tol=1e-13) Error in solvet(info.matrix, tol = tol) : apparently singular matrix > traceback() 4: stop("apparently singular matrix") 3: solvet(info.matrix, tol = tol) 2: fitter(X, Y, initial = f$coef, maxit = 1, tol = tol) 1: lrm(y ~ X, penalty = 100, tol = 1e-13) Any idea what the reason for this error is? T...

...;) f <- ols(democrat ~ rcs(pdensity,4) + rcs(pop.change,3) + rcs(older,3) + crime + rcs(college,5) + rcs(income,4) + rcs(college,5) %ia% rcs(income,4) + rcs(farm,3) + rcs(white,5) + rcs(turnout,3), data=counties) f an <- anova(f) and the error message reads as: Error in solvet(cov[idx, idx], coef[idx], tol = tol) : apparently singular matrix Does anyone have a clue? Thanks [[alternative HTML version deleted]]

...mode = 0660 user = postfix group = postfix } } I did not see AUTH in the telnet connection. EHLO mail.domain.mn 250-ns1.domain.mn 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN How to solvet this ? Best regards, Tseveen

When I try to the code from library(survival) of library(ISwR), the following code survfit(Surv(days,status==1)) that could produce Kaplan-Meier estimates shows the following error "Error in survfit(Surv(days, status == 1)) : Survfit requires a formula or a coxph fit as the first argument" How it can be done in R.2.10 -- View this message in context: