Antonio Piccolboni antonio at piccolboni.info writes:
Hi,
I was wondering if there is anything more efficient than split to do the
kind of conversion in the subject. If I create a data frame as in
system.time({fd = data.frame(x=1:2000, y = rnorm(2000), id = paste(x,
1:2000, sep =))})
On 01/05/2012 00:28, Antonio Piccolboni wrote:
Hi,
I was wondering if there is anything more efficient than split to do the
kind of conversion in the subject. If I create a data frame as in
system.time({fd = data.frame(x=1:2000, y = rnorm(2000), id = paste(x,
1:2000, sep =))})
user system
This is not a problem at all. The log likelihood function is a function of the
model parameters and the data, but it is defined up to an additive arbitrary
constant, i.e. L(\theta) and L(\theta) + k are completely equivalent, for any
k. This does not affect model comparisons or hypothesis
It seems like people need to hear more context, happy to provide it. I am
implementing a serialization format (typedbytes, HADOOP-1722 if people want
the gory details) to make R and Hadoop interoperate better (RHadoop
project, package rmr). It is a row first format and it's already
implemented as
Ok, it seems that R's AIC and BIC functions warn about different constants,
so that's probably enough. The constants are not irrelevant though, if you
compute the log-likelihood of one model using StructTS, and then fit
alternative model using other functions such as arima(), which do take
account
On May 1, 2012, at 1:26 PM, Antonio Piccolboni anto...@piccolboni.info wrote:
It seems like people need to hear more context, happy to provide it. I am
implementing a serialization format (typedbytes, HADOOP-1722 if people want
the gory details) to make R and Hadoop interoperate better
On 29/04/12 13:50, Duncan Murdoch wrote:
On 12-04-29 3:30 AM, Philippe Grosjean wrote:
Hello,
?delayedAssign presents substitute() as a way to look at the expression
in the promise. However,
msg- old
delayedAssign(x, msg)
msg- new!
x #- new!
substitute(x) #- x (was 'msg' ?)
On 12-05-01 4:21 PM, Philippe Grosjean wrote:
On 29/04/12 13:50, Duncan Murdoch wrote:
On 12-04-29 3:30 AM, Philippe Grosjean wrote:
Hello,
?delayedAssign presents substitute() as a way to look at the expression
in the promise. However,
msg- old
delayedAssign(x, msg)
On Tue, May 1, 2012 at 11:29 AM, Simon Urbanek
simon.urba...@r-project.orgwrote:
On May 1, 2012, at 1:26 PM, Antonio Piccolboni anto...@piccolboni.info
wrote:
It seems like people need to hear more context, happy to provide it. I am
implementing a serialization format (typedbytes,
