Rank: 569 based on 128 downloads (last 30 days) and 7 files submitted
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Ambarish Jash

E-mail
Company/University
University of Colorado, Boulder

Personal Profile:

Currently I am the chief research analyst at WAVi Co.

Professional Interests:
Signal Processing, Machine Learning, Content based information retrieval

 

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Files Posted by Ambarish View all
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03 Nov 2010 Screenshot Eigen Function of the Laplacian The main file Diffusion_Family.m gives a low dimensional embedding in 3 different ways. Author: Ambarish Jash signal processing, data exploration, modeling, nonlinear, manifold learning, dimension reduction 10 0
22 Apr 2010 Screenshot Mandelbrot Set Generating a mandelbrot set Author: Ambarish Jash fractal 2 0
20 Apr 2010 Screenshot Kernel PCA Non-linear dimension reduction using kernel PCA. Author: Ambarish Jash kernel pca, dimension reduction, pca, kernel technique, nonlinear, signal processing 85 10
  • 4.5
4.5 | 4 ratings
14 Apr 2010 Kernel Ridge Regression This is ridge regression implemented using the Gaussian Kernel. Author: Ambarish Jash signal processing, statistics, nonlinear, regression 16 0
31 May 2009 Screenshot Variance while using xcov/xcorr The code calculates the variance in a calculated correlation function Author: Ambarish Jash signal processing, statistics 1 0
Comments and Ratings by Ambarish View all
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18 May 2010 Kernel PCA Non-linear dimension reduction using kernel PCA. Author: Ambarish Jash

Lexander try [aa,index] = sort(eig_val,'descend');
clear aa
% May be you cannot ignore the output from sort.

22 Jun 2009 Google Earth Toolbox Various plotting/drawing functions that can be saved as KML output, and loaded in Google Earth Author: scott lee davis

22 Jun 2009 Google Earth Toolbox Various plotting/drawing functions that can be saved as KML output, and loaded in Google Earth Author: scott lee davis

for ge_quiver there is no option to scale the length of the arrows? could you please add that. -Thank you
02 Jun 2009 Speed using nvidia graphics card and accelerEyes jacket The code tests the increase in speed up of matrix multiplication. Author: Ambarish Jash

AccelerEyes jacket has to be installed. Also the cuda package has to be in the matlab path.
01 Jun 2009 Speed using nvidia graphics card and accelerEyes jacket The code tests the increase in speed up of matrix multiplication. Author: Ambarish Jash

Comments and Ratings on Ambarish's Files View all
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28 Sep 2011 Kernel PCA Non-linear dimension reduction using kernel PCA. Author: Ambarish Jash BigZero

I think there are some mistake in this implementation, the last step the feature vector feature dimension reduction procedure is incorrect, since you can not do it in this way. If you do it in this way, how can you tell the difference between PCA and KPCA. we should do it by using inner product form.

02 Sep 2011 Kernel PCA Non-linear dimension reduction using kernel PCA. Author: Ambarish Jash Hossain, Md. Ali

I am unable to run the algorithm for large data set. I am working on hyperspectral image of size 191x370856. What can I do and what is the best solution.
14 Aug 2011 Kernel PCA Non-linear dimension reduction using kernel PCA. Author: Ambarish Jash Natalie

Sorry Enrique I don't understand your second point. Surely it doesn't matter whether you normalize just the non-zero eigenvalues or all of the eigenvalues since the non-zero eigenvalues won't change the projections? Have I missed something? Thanks.
11 Jun 2011 Kernel PCA Non-linear dimension reduction using kernel PCA. Author: Ambarish Jash rem

I used this code for face recognition, i chosed Gaussian kernel and ploynominal kernel, but i have not seen any improvement over Eigenface.

27 Apr 2011 Kernel PCA Non-linear dimension reduction using kernel PCA. Author: Ambarish Jash Li, Weizhi

Top Tags Applied by Ambarish
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signal processing, nonlinear, statistics, dimension reduction, data exploration
Files Tagged by Ambarish View all
  • 1 - 5 of
  • 7
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
03 Nov 2010 Screenshot Eigen Function of the Laplacian The main file Diffusion_Family.m gives a low dimensional embedding in 3 different ways. Author: Ambarish Jash signal processing, data exploration, modeling, nonlinear, manifold learning, dimension reduction 10 0
22 Apr 2010 Screenshot Mandelbrot Set Generating a mandelbrot set Author: Ambarish Jash fractal 2 0
20 Apr 2010 Screenshot Kernel PCA Non-linear dimension reduction using kernel PCA. Author: Ambarish Jash kernel pca, dimension reduction, pca, kernel technique, nonlinear, signal processing 85 10
  • 4.5
4.5 | 4 ratings
14 Apr 2010 Kernel Ridge Regression This is ridge regression implemented using the Gaussian Kernel. Author: Ambarish Jash signal processing, statistics, nonlinear, regression 16 0
31 May 2009 Screenshot Variance while using xcov/xcorr The code calculates the variance in a calculated correlation function Author: Ambarish Jash signal processing, statistics 1 0

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