Hi r users,

I have two data sets (X1, X2). For example,
time1<-c( 0,   8,  15,  22,  43,  64,  85, 106, 127, 148, 169, 190 ,211 )
outpue1<-c(171 ,164 ,150 ,141 ,109 , 73 , 47  ,26  ,15  ,12   ,6   ,2   ,1 )
X1<-cbind(time1,outpue1)

time2<-c( 0   ,8  ,15 , 22  ,43 , 64  ,85 ,106 ,148)
output2<-c( 5   ,5   ,4   ,5   ,5   ,4   ,1   ,2 ,  1 )
X2<-cbind(time2,output2)

I want to merge X1 and X2 into a big dataset X by time1 and time2 so that
the missing item in output2 will be replace by 0. For example, there is no
output2 when time2=127, then the corresponding output will be 0. Anyone know
how to use merge command to deal with this?

Thanks,

Kate

	[[alternative HTML version deleted]]

