[R] Error in linear regression

David Winsemius
2015-12-18T02:11:39Z

> On Dec 17, 2015, at 1:13 PM, Saba Sehrish via R-help <r-help at
r-project.org> wrote:
>
> Hi I am trying to apply linear regression on the attached data

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> of two variables (DODGX, TRMCX) in R by taking into account time lag=5 for
both of them. Each time I run this command, it gives me following error:
> Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) :
NA/NaN/Inf in 'y'In addition: Warning message:In model.response(mf,
"numeric") : NAs introduced by coercion
> Following is the programming I am using:
>
>
data<-read.csv(file="---",header=T)A<-as.matrix(data$DODGX)B<-as.matrix(data$TRMCX)
>
nrow<-nrow(A)A1<-matrix(NA,nrow,1)A2<-matrix(NA,nrow,1)A3<-matrix(NA,nrow,1)A4<-matrix(NA,nrow,1)A5<-matrix(NA,nrow,1)A1[2:nrow,1]<-A[1:(nrow-1),1]A2[3:nrow,1]<-A[1:(nrow-2),1]A3[4:nrow,1]<-A[1:(nrow-3),1]A4[5:nrow,1]<-A[1:(nrow-4),1]A5[6:nrow,1]<-A[1:(nrow-5),1]nrow<-nrow(B)B1<-matrix(NA,nrow,1)B2<-matrix(NA,nrow,1)B3<-matrix(NA,nrow,1)B4<-matrix(NA,nrow,1)B5<-matrix(NA,nrow,1)B1[2:nrow,1]<-B[1:(nrow-1),1]B2[3:nrow,1]<-B[1:(nrow-2),1]B3[4:nrow,1]<-B[1:(nrow-3),1]B4[5:nrow,1]<-B[1:(nrow-4),1]B5[6:nrow,1]<-B[1:(nrow-5),1]
>
reg1<-lm(A~A1+A2+A3+A4+A5+B1+B2+B3+B4+B5)reg2<-lm(B~B1+B2+B3+B4+B5+A1+A2+A3+A4+A5)

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--
David Winsemius
Alameda, CA, USA