Hi,
I would like to create M paths of 2 correlated brownian motion incrementals
where each path is of length N. I use mvrnorm to create all the increments,
i.e.
h - 1.0;
COV - matrix(c(1,0,0,1),nrow=2);
dW- h * t(mvrnorm(n=N*M,mu=c(0,0),Sigma=COV));
The next step is that I'd like to
Hi,
I did some googling. I found multiple ODE solver packages. But I am
wondering if there is any terminal value ODE solver (linear case) for
multi-dimension case or not? I have not come across any. Any guidance would
be appreciated.
Robert
[[alternative HTML version deleted]]
Hi,
I was trying to call chart.Posn. I ran into an unusual problem. It
complains that:
Error in strheight(axt):
X11 font -adobe-helvetica-%s-%s-*-*-%d-*-*-*-*..., face 1 at size 11
could not be loaded.
I am wondering how to fix this? It seems something is missing from X11
device but I don't
Hello,
I am not sure how to do this in R. Any suggestion would be
appreciated. I have a vector of values from where I build an empirical
CDF. For example:
x - seq(1,100)
x - sample(x,1000,replace=T)
quantile(x,probs=seq(0,1,.05))
0% 5%10%15%20%25%30%35%40%
.
HTH,
Jorge.-
On Tue, Jan 10, 2012 at 11:52 PM, Robert A'gata wrote:
Hello,
I am not sure how to do this in R. Any suggestion would be
appreciated. I have a vector of values from where I build an empirical
CDF. For example:
x - seq(1,100)
x - sample(x,1000,replace=T)
quantile(x,probs
Hi,
I am wondering if anybody ever come across any implementation of
product integral in R? As far as I googled, I haven't come across any
package. Is there any? Thank you.
http://en.wikipedia.org/wiki/Product_integral
Regards,
Robert
__
Hi,
I have a function that I need to do double integration:
\int^T_0 \int^t_0 N(\delta / \sigma \sqrt(u)) (1-N(\delta / \sigma
\sqrt(u))) du dt
where N(x) is a standard normal probability of x.
I start off by writing an inner integral into a function. Meaning
\int^t_0 N(\delta,\sigma \sqrt(u))
-finance-boun...@r-project.org] On Behalf Of Robert A'gata
Sent: Wednesday, 5 October 2011 2:41 PM
To: r-help@r-project.org; r-sig-fina...@stat.math.ethz.ch
Subject: [R-SIG-Finance] AsOf join in R
Hi,
I tried to google for any solution for asof join operator in R. But I
couldn't find one
of certain
securities Commonwealth Bank is or may be the only market maker.
-Original Message-
From: Robert A'gata [mailto:rhelp...@gmail.com]
Sent: Thursday, 6 October 2011 12:08 PM
To: Roupell, Darko; r-help@r-project.org; r-sig-fina...@stat.math.ethz.ch
Subject: Re: [R-SIG-Finance
Hi,
I tried to google for any solution for asof join operator in R. But I
couldn't find one. The asof join operator AsOf(A,B) merges 2 time
series by looking for latest available value of B prior to each time
point in A. For example,
A - xts(c(10,15,20,25),
residuals -- see
http://www.burns-stat.com/pages/Working/ljungbox.pdf
However, this is an in-sample test. Much
better is to do out-of-sample tests.
On 04/06/2011 04:46, Robert A'gata wrote:
Hi,
I would like to ask for a guideline on how to assess quality of fit
for MA, ARMA and GARCH
Hi,
I'm wondering what's the right value for specifying America/New_York
time zone on a windows machine? I got my code which specify this time
zone on as.POSIXct function work properly with this value on a linux
machine. But it keeps giving me complaint on windows. Thank you.
Cheers,
Robert
Hi,
I always have a question about how to do this best in R. I have a data
frame and a set of criteria to filter points out. My procedure is to
always locate indices of those points, check if index vector length is
greater than 0 or not and then remove them. Meaning
dftest -
Hi,
I realized that when I have irregular series to feed into lineChart,
the interval of each point in the chart does not seem to take care of
irregular time interval I specified in my input xts time series. But
rather, lineChart seems to take each point as equal spaced time
series. For example,
Hi,
I have 2 questions regarding using loess function in stats package.
1. I have about 1 million points. I did loess with alpha=0.5 and
degree=1 and 2 regressors. It has run for more than 5 hrs on 64bit
16CPU and 64GB server (with no other process running). I am wondering
if this is usual? And
Hi - I am wondering if there is any package that does plotting of
joint histogram between 2 variables, i.e. f(x,y). I found rgl but it
seems not so intuitive to use. I'm wondering if there is any
alternative. Thank you.
Robert
__
R-help@r-project.org
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