As it says, some of your variables appear not to vary, which means LDA is not appropriate. LDA assumes a common multivariate normal distribution for the variation of each group about the group centre, and that cannot generate data like yours.
On Fri, 19 Dec 2003, Yun-Fang Juan wrote: > oh sorry > here is the error. > Please advice. > > thanks, > > Yun-Fang > > > lda1 <- lda(retention ~ . , data=RetentionDF40[1:10000,]); > Error in lda.default(x, grouping, ...) : variable(s) 11 14 24 29 30 31 > 32 33 34 35 41 43 44 47 48 49 50 51 54 55 56 57 58 59 60 > 61 65 66 67 68 70 71 72 74 78 82 85 87 88 89 91 92 93 101 > 102 103 107 108 109 111 112 117 122 124 125 127 148 151 153 155 156 162 170 > 173 176 181 182 183 184 186 189 190 192 193 194 196 200 209 212 213 214 215 > 216 218 220 222 223 224 228 230 231 234 235 236 237 appear to be constant > within groups > > ----- Original Message ----- > From: "Marc R. Feldesman" <[EMAIL PROTECTED]> > To: "Yun-Fang Juan" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> > Sent: Friday, December 19, 2003 6:38 PM > Subject: Re: [R] Error running LDA > > > > At 06:13 PM 12/19/2003, Yun-Fang Juan wrote: > > >Hi, > > >I try to run the linear discriminant analysis using the following > command > > >but got an error like the following. > > >lda1 <- lda(retention ~ . , data=RetentionDF40[1:10000,]); > > > > > > > What error did you get? Did you read the help file for lda? What version > > of R and what version of VR are you using? What platform? > > > > > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
