On Fri, 2005-05-08 at 12:12 +0000, 吴 昊 wrote: > Hi, > I have a sparse matrix.I want to fill values into the entries whose value > is 0.The new generated values should come from the interpolation of the > values have existed.Does R provide such interpolation functions which > operate on Matrix, for example ,such a matrix below > 0 0 0 0 2.3 0 0 0 0 > 0 0 3.1 0 0 0 0 1.4 0 > 0 0 0 0 0 0 0 0 0 > 1.1 0 0 0 0 0 0 0 0 > 0 0 0 4 0 0 0 0 6 > 0 0 0 0 0 0 0 0 0 > 0 0 0 0 0 7 0 0 0 > 0 3 0 0 0 0 6 0 0 > 0 0 0 0 9 0 0 0 0 > thanks a lot > hao wu
Does this look like an answer? If anyone knows a better way please tell me. > d<-c(0,2,3,2,0,3,4,0,0,0,0,0) > d.mat<-matrix(data=d,nrow=4,ncol=3,byrow=TRUE) > for(i in 1:length(d.mat[1,])){ + d.mat[,i][d.mat[,i]==0]<-mean(d.mat[,i][d.mat[,i]>0]) + } Thanks Tom ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html