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I've just published a new book for R beginners in Portuguese: "Conhecendo o R: uma vis?o estat?stica" (something like "Knowing R: an statistical approach"). I'd like to include it on the list "Books" at R-project...

Dear all, I?m working on a paper that analyze the performance of alternatives investment in a liability driven framework (LDI). Basically adding alternatives investimentos to a pension fund portfolio. My portfolio return is the return on assets minus liabilities...

Hi djmuseR, I tried installing and running the script that you suggested. But with every value I tried for a, b, c and d I get one of those 2 error messages Error in nls(y ~ a - b * exp(-c...

Hi guys, I am still learning R, and not well familiar with all the apply functions. I am trying to find faster alternatives to replace the for cycle. Is there a faster way to do the example below? nm <- 1000...

I would like to divide a vector in 9 groups in a way that each number is present in only one group. In a vector of 783 I would like to divide in 9 different groups of 87 Example <- matrix...

Hello, I have a matrix with the numbers 0,1 and 9 I would like to write a function that could sum each line skiping everytime a number 9 appears for example [0 1 0 1 1 9 1] the...

After I run my script I save all my output e.g. write.table(d, file = "C:/PINEheight.txt) write.table(v, file = "C:/PINEvolume.txt) write.table(v, file = "C:/PINEdiameter.txt) write.table(v, file = "C:/PINEdensity.txt...

Hi folks, I was wondering how to run a mixed models approach to analyze a linear regression with a user-defined covariance structure. I have my model y = xa +zb +e and b ~ N (0, C*sigma_square). (and a...

#Mdarts is a matrix 2343x788 #frequencia is a vector 2343x1 # 9 in Mdarts[fri,frj] stands for my missing values which i want to replace by the value in the vector frequencia Mdarts<-t(matrix(scan("C:/GWS/CNB/dartg...

Hello R-helpers, I have the following code that works well, b <-list() for (i in 1:3){ a <- matrix(runif(1),3,3) b[[i]] <- a } b however, I need to do something similar with two loops and I...

Good Mourning, I have a function to generate a matrix as I show part of it; g[j,i]<-if (gen[j,i]==0) al1[i,1]+al1[i,1] else ... However i would like that this function occurred with...

sammyny wrote: > > I did a fourier transform on a function in time domain to get the following > functions in frequency domain (in latex): > > $Y_1[\omega] = \frac{1}{1-\phi_1 e^{-jw}}$ > > $Y_2[\omega] = \frac{1}{1-(\phi...

Hi guys, does anyone know whether there is a similar function for Mac? I mean... is there an winMenuAdd funtion for R users on Mac? Thanks in advance, Marcio On 12/14/09 10:15 AM, Philippe Bouchet wrote: > > On...

Deal R Users, I'm trying to find out how can I compute probabilities on a Bayesian Network using R. The Bayesian Network I modelled is shown at http://www.dsr.inpe.br/~mello/1727/BNgrapmodel.png and I'd...

Hi there, I'm stuck, but since I just started learning R, this might be a trivial problem. I need to do a bootstrap on the variance among the eigenvalues of a matrix. I can get this variance doing this...

I have a matrix 700x2000 which is sampled in each cycle from another matrix 788x2000 with the numbers 0,1 and 9 There is one specific collumn of this matrix, dart[,1977], that usually, after the samplimg procedure has only...

For Windows you can use winMenuAdd function. Type ?winAddMenu to see how... Good luck, Marcio www.dsr.inpe.br/~mello On 3/6/08 10:35 AM, Alberto Monteiro wrote: > > er MIMI& piki PIKINHA wrote: >> >> Hello, I?m spanish student...

hello R-helpers, I have an array acuracia <- array(NA, dim = c(1, 1, A, B, C)) which is first defined and in the example above with dimensions 1x1xAxBxC. My array is then filled using 3 loops (I am not...

Hi guys, my doubt is quite simple, I?ll try to explain: test = matrix(0, nrow = 783, ncol = 12) for (x in 1:9){ .... for (y in 1:12){ ### In the original script for each y its generated a vector...

Thanks Ben! I will! Em 4/7/2011 8:32 AM, Ben Bolker escreveu: > Marcio Pupin Mello<mello<at> ieee.org> writes: > >> I've just published a new book for R beginners in Portuguese: >> "Conhecendo o R: uma vis?o...