Hello,
Sorry if I've misread your original post.
See answer inline
Em 28-06-2012 05:15, Mohan Radhakrishnan escreveu:
Not being the expert I have looked at papers like 'simpleR { Using R for
Introductory Statistics' by John Verzani. Some sample Code is in these
papers. Looks like I have to search for ideas to code a programming
language like Java by taking input from R(r-java). Can R be used
directly to hit web url's based on distributions that these functions
generates ?
?rnorm
?runif
?rgamma
?rexp
R can be used to access the web using url's as connections. The base and
utils functions scan(), read.table(), readLines(), etc, can use a url.
Here's an example with readLines(). It reads r-project's home page.
url <- "http://www.r-project.org/";
u <- file(url, open="rt")
x <- readLines(u)
close(u)
length(x)
[1] 26
x
I also realize the work 'Simulation' means simulation of queues or other
simulation experiments. Law's book on simulation ?
This is about generation of traffic.
I don't know that book in particular but if the times between events
follow an exponential distribution with rate parameter lambda then the
number N(t) of events that occur in a time interval of units of time
follows a Poisson with parameter lambda*t. Since you've said
"self-similar" I assume that the exponentials are (independent and)
identically distributed, i.e., a Homogeneous Poisson Process. This is
very easy to simulate, and a standard textbook exercise. Google it and
you'll find usefull links in the first page. (To generate the times of
events use rexp.)
Rui Barradas
Mohan
-----Original Message-----
From: David Winsemius [mailto:dwinsem...@comcast.net]
Sent: Wednesday, June 27, 2012 8:13 PM
To: Mohan Radhakrishnan
Cc: r-help@r-project.org
Subject: Re: [R] Simulating web requests
On Jun 27, 2012, at 6:58 AM, Mohan Radhakrishnan wrote:
Homework ? You mean the question is at a high level.
I use R. It is just the simulation part that I am investigating.
Several
papers on Capacity Planning that I am working on are useful for
analyzing log traffic using R for GOF tests etc. But I am not able to
find many papers on using R or r-java to generate traffic that
simulates
distributions. SciPY could be useful here but it looks like
interfacing
R and Java can help.
Maybe I am on the wrong track here but the only other option seems
to be
expensive simulators.
I'm sure Rui would be happy to get a small consulting fee to show you
how to do it in one line of R code.
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