similar to: to creates an array

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I must to create an array with dimensions 120x8x500. Better I have to make 500 simulations of 8 series of return from a multivariate normal distribution. there's the command "mvrnorm" but how I can do this repeating the simulation 500 times?" [[alternative HTML version deleted]]

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Sto imparando ora ad utilizzare R. Ho un problema: devo caricare i dati da un file xls creato da me, utilizzando la funzione "read.xls" produce il seguente errore: Errore in xls2csv(xls, sheet, verbose = verbose, ..., perl = perl) : Unable to read xls file 'indagineUSA.xls'. Errore in file.exists(tfn) : argomento 'file' non valido Cosa c'è che non va? La directory

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I got the data working, but now I got another problem with KSVM: line search fails -2.793708 -0.5831701 1.870406e-05 -5.728611e-06 -5.059796e-08 -3.761822e-08 -7.308871e-13Error in prob.model(object)[[p]]$A : $ operator is invalid for atomic vectors On Tue, Jul 7, 2009 at 6:45 PM, Steve Lianoglou<mailinglist.honeypot at gmail.com> wrote: > Hi, > > On Jul 7, 2009, at 6:44 PM,

Hello all, I have a seemingly simple question which I have searched for an answer for for a few hours without luck. I have a matrix of both values and characters with thousands of rows. I would like to run a search of this matrix for certain values and would like the search to retrieve the entire row. How would I accomplish this? Thanks! Mehdi Khan [[alternative HTML version deleted]]

Without trying to understand your code in detail let me just assume you are trying to create a matrix, ret, whose i,j-th entry is some function, f, of row i of X and row j of X. In that case this should do it: apply(X,1,function(x)apply(X,1,function(y)f(x,y))) Date: Wed, 30 Jun 2004 15:28:47 -0300 (ART) From: <daniel at sintesys.com.ar> To: <r-help at stat.math.ethz.ch>

I have to calculate the logreturn variance in the Heston model. How can I do? Do you know some function that calculates it? Thank you Barbara -- ________________________________________________________ Le informazioni contenute in questo messaggio di posta elettronica sono strettamente riservate e indirizzate esclusivamente al destinatario. Si prega di non leggere, fare copia, inoltrare a

Not sure if there is an R way to do this or a regular express way, but here is what I am trying to do. I've got lots of data where the format is HH:MM:SS, but I need to format it like HH:MM:00, i.e. round the second down to zero. What is the best way to do this? Thanks again. Jason

Hi, I was wondering if I could get R to warn me, or give me a rude awakening somehow, if I'm accessing a variable that is out of my function's scope. For example, often times I'm creating a function as I'm testing it in the REPL, copying and pasting between both. As a simple example, I might end up with a function like: f <- function(a, b) { a + b.test } Where

Dear all, I have to minimize a (real) function in a loop (say i in (1:1000)) and store its ``$estimate'', via l2estim<-nlm(f.minimo,c(-.01,0.1))$estimate into a vector for further analisys. Since the function's behaviour is quite peculiar (in the sense that in the simulation study it may not have a minumum), sometimes I get the the warning Error in nlm(minimo, c(-0.01, 0.1),

Hoping someone can offer me some assistance. I'm trying to execute a script and I keep getting this error message about "Error: element 12 is empty". I'm wondering if my syntax is incorrect within legend.list. If anyone has any suggestions to sees something obvious that I am missing, I would greatly appreciate any help. Many Thanks, Patrick > # These are the symbols and

What's wrong? Very sad about this... model <- ksvm(x=mytraindata[, -1], y=factor(mytraindata[, 1]), prob.model=T) Error in .local(x, ...) : x and y don't match.

Hi, I drew a plot with R of my data and now I would like to display the median values of each group above the respective datapoint in the plot. I already search for ages, but maybe I am just blind. I am sure that this has to be an option somewhere... I appreciate any kind of input! Best, Christian

Hi, Is there a function in R to do a-b where a and b are two non-numeric sets (or intersection complement of these two sets). Kind Regards, Praveen. [[alternative HTML version deleted]]

Hi I want to simulate random numbers normal distributed with this size (2000,10000). I tried this but my computer exhaust there is a fast way to make it? randz<-matrix(rnorm(2000000),2000,10000) [[alternative HTML version deleted]]

Hi all, could someone send me examples of the EM Clustering algorithm and/or some pdf describing it? Thanks, Douglas Sousa.