Re: [R] Partial Proportional Odds model using vglm
At 13:01 16/07/2007, Rizwan Younis wrote: Hi: I am trying to fit a PPO model using vglm from VGAM, and get an error while executing the code. You seem to keep posting the same problem. Since the only person who can tell you what is happening inside VGAM is probably the maintainer a more efficient strategy would be to email him as the instructions ask you to do. However if that fails then try simplifying your problem to see if the error goes away 1) try merging ages 1 and 2, and ages 4 and 5 2) try merging column 3 2 with 2 1 or 4 3 Here is the data, code, and error: Data = rc13, first row is the column names. a = age, and 1,2,3, 4 and 5 are condition grades. a 1 2 3 4 5 1 1 0 0 0 0 2 84 2 7 10 2 3 16 0 6 6 2 4 13 0 3 4 0 5 0 0 0 1 0 Library(VGAM) rc13-read.table(icg_rcPivot_group2.txt,header=F) names(rc13)-c(a,1,2,3,4,5) ppo-vglm(cbind(rc13[,2],rc13[,3],rc13[,4],rc13[,5],rc13[,6])~a,family = cumulative(link = logit, parallel = F , reverse = F),na.action=na.pass, data=rc13) summary(ppo) I get the following error: Error in [-(`*tmp*`, , index, value = c(1.13512932539841, 0.533057528200189, : number of items to replace is not a multiple of replacement length In addition: Warning messages: 1: NaNs produced in: log(x) 2: fitted values close to 0 or 1 in: tfun(mu = mu, y = y, w = w, res = FALSE, eta = eta, extra) 3: 19 elements replaced by 1.819e-12 in: checkwz(wz, M = M, trace = trace, wzeps = control$wzepsilon) I will appreciate any help to fix this problem. Thanks Reez You Grad Student University of Waterloo Waterloo, ON Canada Michael Dewey http://www.aghmed.fsnet.co.uk __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Partial Proportional Odds model using vglm
Hi: I am trying to fit a PPO model using vglm from VGAM, and get an error while executing the code. Here is the data, code, and error: Data = rc13, first row is the column names. a = age, and 1,2,3, 4 and 5 are condition grades. a 1 2 3 4 5 1 1 0 0 0 0 2 84 2 7 10 2 3 16 0 6 6 2 4 13 0 3 4 0 5 0 0 0 1 0 Library(VGAM) rc13-read.table(icg_rcPivot_group2.txt,header=F) names(rc13)-c(a,1,2,3,4,5) ppo-vglm(cbind(rc13[,2],rc13[,3],rc13[,4],rc13[,5],rc13[,6])~a,family = cumulative(link = logit, parallel = F , reverse = F),na.action=na.pass, data=rc13) summary(ppo) I get the following error: Error in [-(`*tmp*`, , index, value = c(1.13512932539841, 0.533057528200189, : number of items to replace is not a multiple of replacement length In addition: Warning messages: 1: NaNs produced in: log(x) 2: fitted values close to 0 or 1 in: tfun(mu = mu, y = y, w = w, res = FALSE, eta = eta, extra) 3: 19 elements replaced by 1.819e-12 in: checkwz(wz, M = M, trace = trace, wzeps = control$wzepsilon) I will appreciate any help to fix this problem. Thanks Reez You Grad Student University of Waterloo Waterloo, ON Canada __ 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] Partial Proportional Odds model using vglm
Hi: I am trying to fit a PPO model using vglm from VGAM, and get an error while executing the code. Here is the data, code, and error: Data = rc13, first row is the column names. a = age, and 1,2,3, 4 and 5 are condition grades. a 1 2 3 4 5 1 1 0 0 0 0 2 84 2 7 10 2 3 16 0 6 6 2 4 13 0 3 4 0 5 0 0 0 1 0 rc13-read.table(icg_rcPivot_group2.txt,header=F) names(rc13)-c(a,1,2,3,4,5) ppo-vglm(cbind(rc13[,2],rc13[,3],rc13[,4],rc13[,5],rc13[,6])~a,family = cumulative(link = logit, parallel = F , reverse = F),na.action=na.pass, data=rc13) summary(ppo) I get the following error: Error in [-(`*tmp*`, , index, value = c(1.13512932539841, 0.533057528200189, : number of items to replace is not a multiple of replacement length In addition: Warning messages: 1: NaNs produced in: log(x) 2: fitted values close to 0 or 1 in: tfun(mu = mu, y = y, w = w, res = FALSE, eta = eta, extra) 3: 19 elements replaced by 1.819e-12 in: checkwz(wz, M = M, trace = trace, wzeps = control$wzepsilon) I will appreciate any help to fix this problem. Thanks Reez You Grad Student University of Waterloo Waterloo, ON Canada __ 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.
