Message-ID: <644e1f320903011857w38e3071ckd378518efecd49cd@mail.gmail.com>
Date: 2009-03-02T02:57:05Z
From: jim holtman
Subject: Partial sum of a vector
In-Reply-To: <581851.83619.qm@web52104.mail.re2.yahoo.com>
?filter
> x
[1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
> filter(x, rep(1,4))
Time Series:
Start = 1
End = 20
Frequency = 1
[1] NA 10 14 18 22 26 30 34 38 42 46 50 54 58 62 66 70 74 NA NA
On Sun, Mar 1, 2009 at 9:29 PM, Mohammad Sabr <mohammad_sabr at yahoo.com> wrote:
> I am trying to run a loop where I can sum parts of a matrix. For example, I want at each step in the loop to sum the?the next?4-values of a vector. I tried to do the following but the result were wrong:
>
> for (i in 4:T) {
> data_q[i-3,]=sum(data_m[i-3,]:data_m[i,])
> }
>
> can anyone please direct me on what should I do to run this loop properly
>
> Thanks in advance
> ? ? ? ?[[alternative HTML version deleted]]
>
>
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>
>
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem that you are trying to solve?