Rank: 730 based on 150 downloads (last 30 days) and 9 files submitted
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Taesam Lee

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Company/University
INRS-ETE, Quebec

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Professional Interests:
Hydrology, Climate Change, Stochastic, Statistics

 

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Files Posted by Taesam View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
29 Oct 2013 Friction Factor from Moody Diagram Estimate Friction Factor instead obtaining from Moody Diagram Author: Taesam Lee solve 13 0
28 Nov 2011 Screenshot Unit Hydrograph Estimate Unit Hydrograph with Nakayasu, Clark and S-hydrograph Author: Taesam Lee hydrology 16 2
  • 4.0
4.0 | 1 rating
15 Oct 2010 Mutual Information -2 variablle Estimate Mutual Information with kernel density function Author: Taesam Lee simulation, optimization, signal processing, statistics 13 1
18 Aug 2010 Screenshot High-Low plot or percentile (5 and 95) plot This plot is the surrogate of boxplot. Author: Taesam Lee boxplot, statistics 16 1
03 Dec 2009 Screenshot Standardized Precipitation Index gamfit,gamcdf,norminv is used. Author: Taesam Lee statistics, hydrology, climatology 34 4
  • 3.66667
3.7 | 3 ratings
Comments and Ratings by Taesam View all
Updated File Comments Rating
15 Oct 2010 Mutual Information -2 variablle Estimate Mutual Information with kernel density function Author: Taesam Lee

If you have an idea to increase the estimation speed, please let me know.
Thanks

03 Apr 2009 Conditional Nonparametric Kernel Density Condtional Kernel Density Estimate with normal kernel and LSCV bandwidth selection Author: Taesam Lee

function [fcond,Pcond,lambda,yi]=NPcond(y,X,Xc,yi)
%
% Code written by Taesam Lee and Dominique Fasbender 04/03/2009 : INRS-ETE Quebec
% Nonparametric Condtional Distribution
% X : data of condtion variable (numvar*length), y : current variable(length)
% Xc: condtion values
% yi: estimated set for fcond
% example
% t=mvnrnd([0,0],[.9 .4; .4 .3],100);
% X=t(:,1)';y=t(:,2)';yi=-2:0.01:2;Xc=[1];
% [fcond,Pcond,yi]=NPcond(y,X,Xc,yi);
% plot(yi,fcond);plot(yi,Pcond);

Xall=[y;X];
sz=size(Xall);d=sz(1);n=sz(2);

% Estimate the bandwidth ratio
lambda_ref = (4/(d+2))^(1/(d+4))*n^(-1/(d+4));
%min_lambda = 0.25*lambda_ref;max_lambda = 1.1*lambda_ref;
%lambda = fminbnd(@(lambda)LSCV(lambda,Xall',n,d),min_lambda,max_lambda);
lambda=lambda_ref;

% Covariance
Sall=cov(Xall');
Syy=Sall(1,1);Sxy=Sall(2:d,1);Sxx=Sall(2:d,2:d);
Sd=Syy-Sxy'*inv(Sxx)*Sxy;

% Conditional Distribution
difX=repmat(Xc,1,n)-X;% need to be changed
s1=inv(Sxx)
%for in=1:n
% dmat1(in)=(difX(:,in))'*s1*(difX(:,in));
%end
%es=exp(-1/2*lambda_ref^2*dmat1);

es2 = 0;
for i=size(s1,1)
for j=size(s1,2)
es2 = es2 + exp(-1/2*lambda_ref^2*difX(i,:).*difX(i,:)*s1(i,j));
end
end

wi=es2./sum(es2);
bi=Sxy'*inv(Sxx)*difX;

for it=1:length(yi)
fcond(it)=sum(1/sqrt(2*pi*lambda^2*Sd)*wi.*exp(-(yi(it)-bi).^2./(2*lambda^2*Sd)));
Pcond(it)=sum(wi.*normcdf(yi(it),bi,sqrt(lambda^2*Sd)));
end

Comments and Ratings on Taesam's Files View all
Updated File Comment by Comments Rating
28 Mar 2014 Unit Hydrograph Estimate Unit Hydrograph with Nakayasu, Clark and S-hydrograph Author: Taesam Lee Roy, Jonathan

Interesting! But, you need to put more comments, depend of what is the ref. variable are not the sames. For newbies with this technic it could be hard to understand the impact of these variables.

20 Feb 2014 Standardized Precipitation Index gamfit,gamcdf,norminv is used. Author: Taesam Lee rdavtalab

good

16 Apr 2013 High-Low plot or percentile (5 and 95) plot This plot is the surrogate of boxplot. Author: Taesam Lee Hunstig, Matthias

This seems to be a derivative of boxplot.m, even with "Copyright 1993-2005 The MathWorks, Inc." inside. I doubt you can put this under the BSD license.

07 Apr 2013 Unit Hydrograph Estimate Unit Hydrograph with Nakayasu, Clark and S-hydrograph Author: Taesam Lee Jose

Hello,
Can you post the data that you used for plotting the graphic UH.jpg?
It would with good to test your code with your data.

17 Jul 2012 Standardized Precipitation Index gamfit,gamcdf,norminv is used. Author: Taesam Lee sivaranjan, Raja

I don't know how to use this SPI matrix file please any one help me.

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