search for: strangeways

...unction)? example: #Suppose a matrix: m1=cbind(1:5,1:5,1:5) #The aim is to create a new matrix with every column containing the cumulative sum of all previous columns. m2=m1 for(i in 2:ncol(m1)){ m2[,i]=apply(m1[,1:i],1,sum) } m2 Many thanks in advance Eleni Rapsomaniki Research Associate Strangeways Research Laboratory Department of Public Health and Primary Care University of Cambridge ?

...I need is the total estimated time until failure (death), not the probability of failing at a given time (survival probability), or hazard etc, which is what I get from survest and predict for example. I suspect the answer is embarrassing simple... Eleni Rapsomaniki Research Associate Strangeways Research Laboratory Department of Public Health and Primary Care [[alternative HTML version deleted]]

...x=T,y=T) (and don't use linear.predictors=) for better estimates. I would like to turn this specific warning off, as it makes it difficult to detect other (potentially more crucial) warnings generated by other parts of my code. Is there a way to do this? Eleni Rapsomaniki Research Associate Strangeways Research Laboratory Department of Public Health and Primary Care University of Cambridge ?

...update(forml, ~ . -A) #gives me this: #Surv(time, status) ~ x1 + x2 + x3 + x4 + B + x5 + strata(sex) + A:x3 + A:x4 + B:x5 #but I want this: #updated.forml=as.formula("Surv(time, status) ~ x1+x2+x3+x4+B*x5+strata(sex)") Any ideas? Thanks in advance Eleni Rapsomaniki Research Associate Strangeways Research Laboratory Department of Public Health and Primary Care University of Cambridge ?

...other functions I should be aware of? Also, has anybody come across an implementation of the statistic described in: "A global goodness of fit statistic for Cox regression models" by Parzen & Lpisitz, Biometrics 55, 1999 Many thanks in advance Eleni Rapsomaniki Research Associate Strangeways Research Laboratory Department of Public Health and Primary Care University of Cambridge ?

...if I sort tau in ascending times I get 0's UnoC(Surv.rsp, Surv.rsp.new, lpnew, time=sort(tau)) [1] 0 0 0 0 0 0 0 0 0 0 This is a potentially very useful function so it would be great if someone could explain the behaviour here. Many thanks Eleni Rapsomaniki Research Associate/Statistician Strangeways Research Laboratory Department of Public Health and Primary Care University of Cambridge ?

...) {hazard_k(u;x)*S(u;x)} where S(u;x) = exp{-sum_of_k(sum(hazard_k(u))} I have searched extensively for an implementation of this in many packages, but it appears that more complex approaches are more commonly implemented, such as timereg package. Eleni Rapsomaniki Research Associate Strangeways Research Laboratory Department of Public Health and Primary Care University of Cambridge [[alternative HTML version deleted]]

...[homes] comment = Home Directories guest ok = no read only = no writable = yes printable = no browseable = no create mask = 0660 force create mode = 0660 directory mask = 0755 force directory mode = 0755 Any help much appreciated Iain -- Iain Gray Systems Officer Strangeways Research Laboratories Tel 01223 740182 email: iain.gray@srl.cam.ac.uk

...re, though you can still map a network drive by using a UNC pathway: \\server\share so the share is still out there but the server dissapears every so often. Any clues would be much appreciated. Iain ps What is the equiv of samba for macintoshes if there is one?? -- Iain Gray Systems Officer Strangeways Research Laboratories Tel 01223 740176 email: iain.gray@srl.cam.ac.uk