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 this do what you want:
# following up on another idea that was presented
# where are the breaks
dataBreaks - cumsum(c(0
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:
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 a
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 that sum together
]
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:
On Sun, Jul 20, 2008 at 4:16 PM, Ralph S. wrote:
Hi,
I am trying to calculate the sum for each
yes - thank you very much! slowly getting to the full power of R . . .
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
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