Message-ID: <CAAmySGNuRJVH=Hr7tWSeX6vSzoPUZXZeui7-LDVTwjUw+Pp4DA@mail.gmail.com>
Date: 2012-02-22T19:20:47Z
From: R. Michael Weylandt
Subject: removing particular row from matrix
In-Reply-To: <1329936600012-4411348.post@n4.nabble.com>
all you need is rowSums(a == -999.99) -- this will check for -999.99
in *any* spot. If you do only want to check a certain column/row, add
drop=FALSE to your subscripting.
Michael
On Wed, Feb 22, 2012 at 1:50 PM, uday <uday_143_4u at hotmail.com> wrote:
> Hi Petr,
> Thanks for reply
>
> sorry for late message there was typo error the both values are -999.99
> ?a[rowSums(a == ?-999.99) == 0, ], this solution works only if we have to
> remove certain value from matrix.
>
> but if
> a<-matrix(c(1,2,3,5,-999.99,5,-999.99,6,1,5,9,1),nrow=4)
>
> a
> ? ? [,1] ? ?[,2] [,3]
> [1,] ? ?1 -999.99 ? ?1
> [2,] ? ?2 ? ?5.00 ? ?5
> [3,] ? ?3 -999.99 ? ?9
> [4,] ? ?5 ? ?6.00 ? ?1
>
> and I would like to remove whole row those have value -999.99 , this
> particular function does not work
> I got error
>
> Error in rowSums(a[, 2] == -999.99) :
> ?'x' must be an array of at least two dimensions
>
> ?it need matrix, so is there any way to deal with this kind of problem.
>
>
> Cheers
> Uday
>
> --
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