[R] error in lrm( )

Dear Sir or Madam： I am a doctor of urology,and I am engaged in developing a nomogram of bladder cancer. May I ask for your help on below issue? I set up a dataset which include 317 cases. I got the Binary Logistic Regression model by SPSS.And then I try to reconstruct the model （lrm(REC

[R] A problem －－thank you

dear sir/madam: i have a problem which about the example(lrm). how to get the function "L <- .4*(sex=='male') + .045*(age-50) +(log(cholesterol - 10)-5.2)*(-2*(sex=='female') + 2*(sex=='male'))". thank you example(lrm) n <- 1000 # define sample size set.seed(17) # so can reproduce

[R] A problem －－thank you

dear:teacher i have a problem which about the polr()(package "MASS"), if the response must have 3 or more levels? and how to fit the polr() to 2 levels? thank you. turly yours [[alternative HTML

[R] I have aproblem --thank you

dear teacher: thank you for your help,witn your help i develop the nomogram successfully. after that i want to do the internal validation to the nomogram.i wish to use the bootstrap to achieve the prediction accuracy of the nomogram,and then i encounter problem again,just like that.(error to :

[R] have aproblem --thank you

dear professor: thank you for your help,witn your help i develop the nomogram successfully. after that i want to do the internal validation to the model.i ues the bootpred to do it,and then i encounter problem again,just like that.(错误于error to :complete.cases(x, y, wt) : 不是所有的参数都一样长(the lengt

[R] i have aproblem --thank you

dear professor: thank you for your help,witn your help i develop the nomogram successfully. after that i want to do the internal validation to the model.i ues the bootpred to do it,and then i encounter problem again,just like that.(´íÎóÓÚerror to :complete.cases(x, y, wt) : ²»ÊÇËùÓеIJÎÊý¶¼Ò»

[R] 2010年10月4日 19:14:45 自动保存草稿

dear professor: thank you for your help,witn your help i develop the nomogram successfully. after that i want to do the internal validation to the model.i ues the bootpred to do it,and then i encounter problem again,just like that.(´íÎóÓÚerror to :complete.cases(x, y, wt) : ²»ÊÇËùÓеIJÎÊý¶¼Ò»Ñ

[R] I have aproblem about nomogram--thank you for your help

dear professor: I have a problem about the nomogram.I have got the result through analysing the dataset "exp2.sav" through multinominal logistic regression by SPSS 17.0. and I want to deveop the nomogram through R-Projject,just like this : > n<-100 > set.seed(10) > T.Grade<-factor(0:3,la

[R] A problem about nomogram--thank you for you help

dear professor: I am a doctor of urinary,and I am developing a nomogram of bladder tumor.Now I have a problem about this. I have got the result like this through analysing the dataset "exp11.sav" through multinominal logistic regression by SPSS 17.0.(the Sig. is high,that is good ,it is just aex

[R] I have a problem

dear£ºDavid Winsemius in the example£¨nomogram£©£¬I don't understand the meanings of the program which have been marked by comment line.And how to compile the program.(L <- .4*(sex=='male') + .045*(age-50) +(log(cholesterol - 10)-5.2)*(-2*(sex=='female') + 2*(sex=='male'))). example(nom

[R] I have a problem

dear£ºDavid Winsemius in the example£¨nomogram£©£¬I don't understand the meanings of the program which have been marked by red line.And how to compile the program.(L <- .4*(sex=='male') + .045*(age-50) +(log(cholesterol - 10)-5.2)*(-2*(sex=='female') + 2*(sex=='male'))). n <- 1000 # de

[R] I have a problem

dear£º in the example£¨nomogram£©£¬I don't understand the meanings of the program which have been marked by red line.And how to compile the program(L <- .4*(sex=='male') + .045*(age-50) + (log(cholesterol - 10)-5.2)*(-2*(sex=='female') + 2*(sex=='male'))). n <- 1000 # define sample size s

[R] a problem

dear: when I read a Excel file(exp-11),The R project give me a error ,Just like this: 缺少'datafile' > write.foreign("exp-11.xls") 错误于list(df = df, datafile = datafile, codefile = codefile) : 缺少'datafile' > write.foreign("exp-11.xls") 错误于list(df = df, datafile = datafile, codefile = codefile

[R] I need the dataset--thank you

dear: I am a user of R project.And now ,I have a problem. I want to know what is the name of the datasets in the web page--"Draw a Nomogram Representing a Regression Fit" which come from the R-home(http://www.r-project.org/ Package rms version 3.0-0). And can you supply the dataset to me? w

[R] I have a question on nomograms.

Dear volunteer: I am a graduate student of medcine in china.And now,I am devoting myself to constructing a nomograms of bladder cancer.I want to do it with R-project.However, I do not know how to construct a nomograms with R-project.I want to get yours help,thank you! I wish you can tell me