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29 results for “from:MarcioRibeiro”

Discriminant Analysis Ellipse
MarcioRibeiro · Apr 9, 2009 · r-help

Hi listers, I am working on a program in order to create an ellipse as a limit of my observations there are well classified. I have two independent variables for an quadratic discriminant function between 2 groups where my mean...

Matrix multiplication - code problem
MarcioRibeiro · Apr 1, 2009 · r-help

Hi again... I will get an array with 5 matrix 2x2, with dimension 2x2x5 This code below works fine... And I am applying the same procedure... The problem might be when I do the permutation of the array, but I...

Simulation Function - Save results
MarcioRibeiro · Aug 14, 2009 · r-help

Hi listers, I am working on a simulation... But I am having some troubles... Suppose I have a function A which produces two results (mean and variance)... Then I would like to simulate this function A with a function B...

Hotteling Test
MarcioRibeiro · Mar 24, 2009 · r-help

Hi listers, I would like to do a graphic of the power function of the Hotteling test (T2). T2~F(p,n-p;lambda), lambda is my paremeter of non-centrality. So I would like to do a graphic of...

Matrix multiplication multivariate
MarcioRibeiro · Feb 20, 2009 · r-help

Hi listers... I am trying to do a matrix multiplication... Suppose my data has 100 obs and 2 variables... I calculated the estimateurs of location and dispersion... So now I would like to do the following... t(Xi-location)%*%solve...

Matrix multiplication - code problem
MarcioRibeiro · Apr 2, 2009 · r-help

Hi again, I understood what you guys explained... But, there isn't a way to do a multiplication of matrix with a FOR command or otherelse where one o my dimension is ONE... Well, as my data file is small...

Count observation
MarcioRibeiro · Jun 11, 2009 · r-help

Hey... Milton... Is that a equation... Brazil=Toronto If so, mine is... Brazil=Montreal You got it... I am not having a good time with R... There is no help for data manipulation at all... Thanks for the help... Marcio...

Graphic Device - View/get all graphics
MarcioRibeiro · Nov 27, 2009 · r-help

Hello, After some research, I didn't resolve my doubt yet... Maybe I didn't explain very well my question... So, I have a bootstrap simulation, but suppose just a simple part of my function: teste <-function(x){ rw_mean...

Simulation Function - Save results
MarcioRibeiro · Aug 17, 2009 · r-help

Ok, the LIST function I understood... What I would like now is to simulate this Function A many times (S) in order to get S results for the MEAN and for the VARIANCE... Zhiliang Ma wrote: > > in order to return...

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