whoops, that's not how you do it. I see my error now.
John Strumila
> -----Original Message-----
> From: Strumila, John [mailto:John.Strumila at team.telstra.com]
> Sent: Thursday, 11 January 2001 2:46 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] lm variable name limit?
>
>
> gday R gurus,
>
> has anyone seen this lm problem?
>
> When I add 2 bytes to the variable name (via names), lm
> returns an error.
> It's as if there's a limit to the size of the variable names.
>
> Any suggestions?
>
> thanks,
> John Strumila
>
> > names(y)[12:14]
> [1] "Log.SQLServer.Locks.RID.Lock.Wait"
"Log.SQLServer.Lock"
>
> [3] "xxaa"
> > names(y)[12]<-"Log.SQLServer.Locks.RID.Lock.Wa"
> >
> my.formula<-as.formula(paste(paste("y$",names(y)[12:14],collap
> se="+",sep="")
> ,' ~
',paste('x$"',names(x),'"',sep="",collapse="+"),"-1"))
> > lm(my.formula)
>
> Call:
> lm(formula = my.formula)
>
> Coefficients:
> x$\"1\" x$\"2\" x$\"3\"
x$\"4\" x$\"6\" x$\"7\" x$\"8\"
> x$\"9\"
> 0 NA NA NA 0 0 NA
> NA
> x$\"10\" x$\"11\" x$\"12\"
x$\"13\" x$\"14\" x$\"15\" x$\"16\"
> x$\"17\"
> 0 NA NA NA 0 NA 0
> NA
> x$\"18\" x$\"19\" x$\"20\"
x$\"21\" x$\"22\" x$\"23\" x$\"24\"
> x$\"25\"
> 0 NA NA NA 0 NA 0
> NA
> x$\"26\" x$\"27\" x$\"28\"
x$\"29\" x$\"30\" x$\"32\" x$\"33\"
> x$\"34\"
> NA 0 NA NA 0 NA NA
> NA
> x$\"35\" x$\"36\" x$\"37\"
x$\"38\" x$\"39\" x$\"40\" x$\"41\"
> x$\"42\"
> NA NA 0 NA 0 NA NA
> NA
> x$\"44\" x$\"45\" x$\"46\"
x$\"47\" x$\"49\" x$\"50\" x$\"52\"
> x$\"53\"
> NA NA NA NA 0 NA 0
> NA
> x$\"54\" x$\"55\" x$\"56\"
x$\"57\" x$\"58\"
> 0 NA 0 NA NA
>
> > names(y)[12]<-"Log.SQLServer.Locks.RID.Lock.Wait"
#<==
> add 2 chars to
> variable name
> >
> my.formula<-as.formula(paste(paste("y$",names(y)[12:14],collap
> se="+",sep="")
> ,' ~
',paste('x$"',names(x),'"',sep="",collapse="+"),"-1"))
> > lm(my.formula)
> Error in y$Log.SQLServer.Locks.RID.Lock.Wait +
> y$Log.SQLServer.Lock + :
> non-numeric argument to binary operator
> > version
> _
> platform i686-pc-linux-gnu
> arch i686
> os linux-gnu
> system i686, linux-gnu
> status
> major 1
> minor 1.0
> year 2000
> month June
> day 15
> language R
>
>
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