[R] removing particular row from matrix

[Petr Savicky]

On Tue, Feb 21, 2012 at 07:52:20AM -0800, uday wrote:
> I have some data set which has some values -999.000 & I would like to remove
> whole row of this kind of values.  
> 
> e.g 
> a<-matrix(c(1,2,3,4,4,5,6,6,-999.99,5,9,-999.00),nrow=4)
> a<-  
> [,1]    [,2]     [,3]
> [1,]    1    4  -999.99
> [2,]    2    5    5.00
> [3,]    3    6    9.00
> [4,]    4    6 -999.00
> 
> expected answer 
> 
>         [,1] [,2]    [,3]
> [1,]    2    5    5.00
> [2,]    3    6    9.00
> 
> I am new in R & I got stuck with this step. 

Hi.

Try this

  a[rowSums(a == -999 | a == -999.99) == 0, ]

      [,1] [,2] [,3]
 [1,]    2    5    5
 [2,]    3    6    9

Hope this helps.

Petr Savicky.