r assistance,
--- On Sun, 3/1/09, Jorge Ivan Velez wrote:
From: Jorge Ivan Velez
Subject: Re: [R] Partial sum of a vector
To: "Mohammad Sabr"
Cc: r-help@r-project.org
Date: Sunday, March 1, 2009, 10:49 PM
Dear Mohammad,
Take a look at the rollmean function in the zoo package.
HTH
Thanks,
It worked.
--- On Sun, 3/1/09, Jorge Ivan Velez wrote:
From: Jorge Ivan Velez
Subject: Re: [R] Partial sum of a vector
To: "Mohammad Sabr"
Cc: r-help@r-project.org
Date: Sunday, March 1, 2009, 11:20 PM
Hi Mohammad,
You need to download and then install the zoo packag
perhaps this?
M <- dim(data_m)[2]
for(j in 1:M){
for (i in 4:T) {
data_q[i-3,j]=sum(data_m[(i-3):i,j])
}
}
of course, you can vectorize this and speed it up significantly, but
there is something evil about premature optimization.
On Mar 2, 1:29 pm, Mohammad Sabr wrote:
> I am t
ollapply"
>
> Is there any file that I need to install or update. I reinstalled the zoo
> package but I still getting the previous problem.
>
> Thank you for your assistance,
>
>
> --- On *Sun, 3/1/09, Jorge Ivan Velez * wrote:
>
> From: Jorge Ivan Velez
>
to install or update. I reinstalled the zoo
package but I still getting the previous problem.
Thank you for your assistance,
--- On Sun, 3/1/09, Jorge Ivan Velez wrote:
From: Jorge Ivan Velez
Subject: Re: [R] Partial sum of a vector
To: "Mohammad Sabr"
Cc: r-help@r-project.org
D
?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 wrote:
> I am trying to run a loop wher
Dear Mohammad,
Take a look at the rollmean function in the zoo package.
HTH,
Jorge
On Sun, Mar 1, 2009 at 9:29 PM, Mohammad Sabr 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
> tri
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 o
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