I am trying to use R for the first time to do some probit analaysis.
I get the following error:
Error in if (!(validmu(mu) && valideta(eta))) stop("cannot find valid starting values: please specify some", :
missing value where TRUE/FALSE needed
This is the command I am using:
m1=glm(Good~Stg.Days+Dev.Deployments+Check.Ins+NoOfDevelopers,family=poisson(link = "probit"),data=deploy[1:4,])
My data deploy[1:4,] are as loaded in from a CSV file follows:
Good,Application Type,Project,Start Date,End Date,Stg Days,Dev Deployments,Check Ins,NoOfDevelopers
1,DocumentPlatform,ZCP,11/08/2010,11/11/2010,0.6,0,12,4
1,DocumentPlatform,ZCP,11/11/2010,09/12/2010,0.4,0,4,1
0,DocumentPlatform,ZCP,09/12/2010,07/03/2011,10,0,7,3
1,FactsheetPlatform,Process.ARCH,28/06/2010,09/03/2011,7.1,0,18,2
deploy is in reality a much bigger vector than 1:4 I am just using a subset of the data to help determine the problem.
Any ideas what is wrong?