Hi,
I am trying to calculate the sum for each occurrence of the level of a factor
in a very large matrix. In addition, I want to save that sum together with the
information of the level of the factor and the level of a second factor.
My matrix looks like this:
x<-matrix(c(1,1,1,2,2,3,3,1,1,7,
On Sun, Jul 20, 2008 at 4:16 PM, Ralph S. <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I am trying to calculate the sum for each occurrence of the level of a factor
> in a very large matrix. In addition, I want to save that sum together with
> the information of the level of the factor and the level of
On Sun, Jul 20, 2008 at 4:47 PM, hadley wickham <[EMAIL PROTECTED]> wrote:
> On Sun, Jul 20, 2008 at 4:16 PM, Ralph S. <[EMAIL PROTECTED]> wrote:
>>
>> Hi,
>>
>> I am trying to calculate the sum for each occurrence of the level of a
>> factor in a very large matrix. In addition, I want to save tha
20 Jul 2008 16:50:41 -0700
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> Subject: Re: [R] Sum efficiently from large matrix according to re-occuring
> levels of factor?
> CC: r-help@r-project.org
>
> On Sun, Jul 20, 2008 at 4:47 PM, hadley wickham wrote:
>> O
---
>> Date: Sun, 20 Jul 2008 16:50:41 -0700
>> From: [EMAIL PROTECTED]
>> To: [EMAIL PROTECTED]
>> Subject: Re: [R] Sum efficiently from large matrix according to re-occuring
>> levels of factor?
>> CC: r-help@r-project.org
>&g
he sum
>> with that corresponding entry, and then record the result of that.
>>
>> Any idea?
>>
>> Best,
>>
>> Ralph
>>
>>
>>
>> ----------------
>>> Date: Sun, 20 Jul 2008 16:50:41 -0700
>>> From: [EMAIL PROTECT
-
>> Date: Sun, 20 Jul 2008 21:21:35 -0400
>> From: [EMAIL PROTECTED]
>> To: [EMAIL PROTECTED]
>> Subject: Re: [R] Sum efficiently from large matrix according to re-occuring
>> levels of factor?
>> CC: [EMAIL PROTECTED]; r-help@r-project.org
>>
>> Does t
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