Serving the Quantitative Finance Community

Search found 9 matches

by soulman
July 5th, 2007, 8:10 am
Forum: Numerical Methods Forum
Topic: Levenberg Marquardt
Replies: 4
Views: 76034

Levenberg Marquardt

<t>Finally found it! If you want to get it working under windows for the constrained case you need to do following (at least it worked for me):copy blaswrap.h from the CLAPACK into the folder where LEVMAR is extracted. open misc_core.c in LEVMAR and add in the beginning of the file#include "blaswrap...
by soulman
July 5th, 2007, 6:53 am
Forum: Numerical Methods Forum
Topic: Levenberg Marquardt
Replies: 4
Views: 76034

Levenberg Marquardt

I forgot to mention that I am building it in Visual Studio 2005
by soulman
July 5th, 2007, 6:52 am
Forum: Numerical Methods Forum
Topic: Levenberg Marquardt
Replies: 4
Views: 76034

Levenberg Marquardt

<r>I am trying to use following Levmar library on a windows XP system for constrained case optimization and therefore need to rely on LAPACK:<URL url="http://www.ics.forth.gr/~lourakis/levmar/It">http://www.ics.forth.gr/~lourakis/levmar/It</URL> seelms there is a problem with the LAPACK library. I h...
by soulman
March 29th, 2007, 11:55 am
Forum: Programming and Software Forum
Topic: using Matlab COM in VB 2005
Replies: 1
Views: 75595

using Matlab COM in VB 2005

Hi,i solved it. For some reason when you pass an array of values from VB to matlab you need to transpose it in matlab before it can be used. I changed the M-file to function a = regLinear(x,y)x=x'y=y'X = [ones(size(x)) x ];a = X\y;and it is working fine!!!
by soulman
March 29th, 2007, 10:17 am
Forum: Programming and Software Forum
Topic: using Matlab COM in VB 2005
Replies: 1
Views: 75595

using Matlab COM in VB 2005

<t>Hi, I have created a COM component and want to access the function via visual basic 2005. the built COM object is based on following simple M-File: function a = regLinear(x,y) X = [ones(size(x)) x ]; a = X\y; all I want to do is pass x and y vector via visual basic and let Matlab calculate the li...
by soulman
October 5th, 2006, 1:43 pm
Forum: General Forum
Topic: covariance with tick data
Replies: 7
Views: 129464

covariance with tick data

hi nikol,i have tried your suggestion but cannot get the mean shifted series to have a correlation of 1. how do you choose your alfa in your weighting?regards
by soulman
October 5th, 2006, 1:43 pm
Forum: General Forum
Topic: covariance with tick data
Replies: 7
Views: 129464

covariance with tick data

hi nikol,i have tried your suggestion but cannot get the mean shifted series to have a correlation of 1. how do you choose your alfa in your weighting?regards
by soulman
November 28th, 2005, 10:45 pm
Forum: Technical Forum
Topic: timing of stochastic processes
Replies: 1
Views: 128685

timing of stochastic processes

<t>Hi,I am trying to estimate the time until a stock order gets filled. E.g. I place an order in t0 for price P0 in the market and know at this time the amount S0 of orders that are before me in the que. I would like to estimate in t>t0 the time that is left until my order gets filled. If I would kn...
by soulman
January 9th, 2005, 1:00 am
Forum: Technical Forum
Topic: how to price option to invest in hedge fund
Replies: 3
Views: 164149

how to price option to invest in hedge fund

<t>Hedge funds normally restrict their investors with the investment. Assume that you can invest in the hedge fund an amount of I1 in time 1 which gives you the option to invest n*I1=I2 in time 2. Assume further that the fund (underlying) follows a lognormal random walk. Would you say that this cont...