: Elliot Joel Bernstein
elliot.bernstein@fdopartners.**comelliot.bernst...@fdopartners.com
To: r-help@r-project.org
Cc:
Sent: Tuesday, August 7, 2012 5:36 PM
Subject: [R] Repeated Aggregation with data.table
I have been using ddply to do aggregation, and I frequently define a
single
elliot.bernstein@fdopartners.**comelliot.bernst...@fdopartners.com
To: r-help@r-project.org
Cc:
Sent: Tuesday, August 7, 2012 5:36 PM
Subject: [R] Repeated Aggregation with data.table
I have been using ddply to do aggregation, and I frequently define a
single aggregation function that I
:
Sent: Tuesday, August 7, 2012 5:36 PM
Subject: [R] Repeated Aggregation with data.table
I have been using ddply to do aggregation, and I frequently define a
single aggregation function that I use to aggregate over different
groups. For example,
require(plyr)
dat - data.frame(x = sample(3, 100
Bernstein elliot.bernst...@fdopartners.com; R help
r-help@r-project.org
Sent: Wednesday, August 8, 2012 9:17 AM
Subject: Re: [R] Repeated Aggregation with data.table
On Aug 7, 2012, at 9:28 PM, arun wrote:
HI,
Try this:
fun1-function(x,.expr){
.expr-expression(list(mean.z=mean(z),sd.z=sd
I have been using ddply to do aggregation, and I frequently define a
single aggregation function that I use to aggregate over different
groups. For example,
require(plyr)
dat - data.frame(x = sample(3, 100, replace=TRUE), y = sample(3, 100,
replace = TRUE), z = rnorm(100))
f - function(x) {
On Tue, Aug 7, 2012 at 4:36 PM, Elliot Joel Bernstein
elliot.bernst...@fdopartners.com wrote:
I have been using ddply to do aggregation, and I frequently define a
single aggregation function that I use to aggregate over different
groups. For example,
require(plyr)
dat - data.frame(x =
.
- Original Message -
From: Elliot Joel Bernstein elliot.bernst...@fdopartners.com
To: r-help@r-project.org
Cc:
Sent: Tuesday, August 7, 2012 5:36 PM
Subject: [R] Repeated Aggregation with data.table
I have been using ddply to do aggregation, and I frequently define a
single aggregation function
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