Rank: 1751 based on 44 downloads (last 30 days) and 4 files submitted
photo

Cleiton Nunes

E-mail
Company/University
www.ufla.br

Personal Profile:

Researches on chemometrics and sensometrics applied to food science and chemical systems.

http://lattes.cnpq.br/4872364161265799

More features for chemometrics in Chemoface: http://chemoface.blogspot.com

Professional Interests:
chemometrics, sensometrics

 

Watch this Author's files

 

Files Posted by Cleiton View all
  • 1 - 4 of
  • 4
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
19 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes chemometrics, classification, simca, svd 9 5
  • 4.0
4.0 | 1 rating
30 Oct 2012 Group means with letters in a multiple comparison test Grouping means by letters in a multiple comparison test Author: Cleiton Nunes statistics, posthoc, anova, multiple comparison 1 0
07 Dec 2011 PLS regression or discriminant analysis, with leave-one-out cross-validation and prediction. M-files for PLS, PLS-DA, with leave-one-out cross-validation and prediction Author: Cleiton Nunes classification, chemometrics, partial least squares, pls, modeling, regression 19 1
01 Jun 2011 Chemometric data preprocessing M-files for data preprocessing by several methods. Author: Cleiton Nunes chemometrics, calibration, preprocessing, classification 15 0
Comments and Ratings by Cleiton
  • 1 - 1 of
  • 1
Updated File Comments Rating
19 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes

Thanks Yang Yang. It was fixed.
Comments and Ratings on Cleiton's Files View all
  • 1 - 5 of
  • 6
Updated File Comment by Comments Rating
28 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes yang, yang

Does the statement, ca = sqrt(2)*erfinv(cl/100), on line 148 in the file of simca.m represents the upper 1 − α quantile of the standard normal distribution? Does it equals to norminv(α,0,1)in Matlab?
27 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes yang, yang

SVD: X=U*sigma*V'
PCA: X'*X=V*sigma^2*V'
Thus,eigenvalues are on the diagonal of sigma^2.
The calculation for Qlim in the file of SIMCA.m might be fixed for the vector eive consisting of the singular values rather than the eigenvalues.
19 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes Nunes, Cleiton

Thanks Yang Yang. It was fixed.
18 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes yang, yang

The statement,
t = E*inv(diag(eive(1:cpret).^.5)), on line 115 in simca file might be written as
t = E*inv(diag(eive(1:cpret))).

29 Oct 2011 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes norhashila

I had try this one and its works!But, I'm not sure how to use the simca_pred. I don't know how to replace the model in the function. When I replace the model with simca_model, the simca_pred stats have the same stat value with simca_model. Could you please explain?
Top Tags Applied by Cleiton
  • 1 - 5 of
  • 13
chemometrics, classification, statistics, anova, calibration
Files Tagged by Cleiton View all
  • 1 - 4 of
  • 4
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
19 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes chemometrics, classification, simca, svd 9 5
  • 4.0
4.0 | 1 rating
30 Oct 2012 Group means with letters in a multiple comparison test Grouping means by letters in a multiple comparison test Author: Cleiton Nunes statistics, posthoc, anova, multiple comparison 1 0
07 Dec 2011 PLS regression or discriminant analysis, with leave-one-out cross-validation and prediction. M-files for PLS, PLS-DA, with leave-one-out cross-validation and prediction Author: Cleiton Nunes classification, chemometrics, partial least squares, pls, modeling, regression 19 1
01 Jun 2011 Chemometric data preprocessing M-files for data preprocessing by several methods. Author: Cleiton Nunes chemometrics, calibration, preprocessing, classification 15 0

Contact us