[R] subset a matrix

[ronggui]

> x=matrix(rnorm(20*30),20)
> y=x[seq(1,20,by=2),seq(1,30,by=2)]



2006/4/12, zhijie zhang <epistat at gmail.com>:
> Dear friends,
>  I have a (20*30) matrix,and want to get a subset 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]]
>
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Deparment of Sociology
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