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...ubset of it like the following: The original matrix: rows:1,2,3,....20; columns:1,2,3,....30 I want to get my subset of The original matrix and delete others: rows:1,3,5,7,...19; columns:1,3,5.....29 -- Kind Regards,Zhi Jie,Zhang ,PHDDepartment of EpidemiologySchool of Public HealthFudan UniversityTel:86-21-54237149 [[alternative HTML version deleted]]

...x and y; 2.select the odd numbers of x and y; 3.combine the selected x and y into coordinates, including the corresponding z-values. This is the subset. Hope someone can solve it. I failed to get the subset. -- Kind Regards,Zhi Jie,Zhang ,PHDDepartment of EpidemiologySchool of Public HealthFudan UniversityTel:86-21-54237149 [[alternative HTML version deleted]]

...d i'm interested in the"R-sig-Geo :R Special Interest Group on using Geographical data and Mapping ",but can't find how to join it, could anybody tell me how to do that? thank u very much! -- Kind Regards,Zhi Jie,Zhang ,PHDDepartment of EpidemiologySchool of Public HealthFudan UniversityTel:86-21-54237149

...ysis of covariance in SAS, but i found that y isn't noramal and can't become normal through transformation. Under that condition, what should i do using R / SAS? Any suggestions are great appreciate! -- Kind Regards,Zhi Jie,Zhang ,PHDDepartment of EpidemiologySchool of Public HealthFudan UniversityTel:86-21-54237149

...id=ID) ccc2<-nb2listw(ccc, glist=NULL, style="W", zero.policy=TRUE) moran.test(LIVES,ccc2,alternative="two.sided") what is the problem? I'm very confused by it? Thanks very very much! -- Kind Regards,Zhi Jie,Zhang ,Department of EpidemiologySchool of Public HealthFudan UniversityTel:86-21-54237149 -------------- next part -------------- 0 264 ccc ID 456 457 0.000161449683 456 471 0.000181372545 456 470 0.000223134489 456 472 0.000252446034 456 455 0.000309741828 439 438 2.23606797e-006 439 454 0.000201933157 439 455 0.000221995495 439 453 0.0...