Hi ManInMoon,

Perhaps the following  apply(yourmatrix, 2, cumsum, na.rm = TRUE) ?   See
?cumsum and ?apply for more information.

HTH,
Jorge


On Thu, Mar 18, 2010 at 10:01 AM, ManInMoon <> wrote:

>
> IIs there an equivalent of cumsum for a matrix? i.e cumsum is applied to
> each
> column ?
>
>
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