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...ur problem? G > > 2008/8/18 stephen sefick <ssefick@gmail.com<http://us.mc339.mail.yahoo.com/mc/compose?to=ssefick@gmail.com> > > > > ?aggregate > > may do what you want > > > > On Mon, Aug 18, 2008 at 8:19 AM, Denise Xifara > > <dionysia-kiara.xifaras@st-hildas.ox.ac.uk<http://us.mc339.mail.yahoo.com/mc/compose?to=dionysia-kiara.xifaras@st-hildas.ox.ac.uk>> wrote: > > > Dear R users, > > > > > > I have a dataframe where column is has countries, column 2 is dates > > > (monthly) for each countrly, the...

Dear All and Mark, Given a dataset that I have called dat, I was hoping to speed up the following loop: for(i in 1:835353){ for(j in 1:86){ if (is.na(dat[i,j])==TRUE){dat[i,j]<-0 }}} Actually I am also having a memory problem. I get the following: Error: cannot allocate vector of size 3.2 Mb In addition: Warning messages: 1: In dat[i, j] <- 0 : Reached total allocation of 1535Mb: see

Dear R users, I have a dataframe where column is has countries, column 2 is dates (monthly) for each countrly, the next 10 columns are my factors where I have measurements for each country and for each date. I have attached a sample of the data in csv format with the data for 3 countries. I would like to convert my monthly data into quarterly data, finding the mean over 3 month periods for

Hi all, I am trying to call a C function from R (version 2.10.1) on a windows machine. The C code is in a .c file, I have pasted the code below although I'm very confident that it does not contain any errors (it is not my code), but also, the problem that I have occurs with every .c file that I have tried this with. I have installed Rtools and included: C:\Rtools\bin; C:\Rtools\perl;

Dear R users, I have run into a very unexpected problem and I was hoping someone could explain it to me. I have a 650 000 by 12 matrix and I want to perform a rolling regression on it, width 36 or 48, using the package performanceAnalytics. ie: rol.lm<-rollingRegression(lm(y~x1+x2+x3+x4+x5),data=denise,width=36) The regressions occur without a problem and I store my output (coefficients,

Hi all, I was wondering whether there is a standard method to carry out fama-macbeth regressions in R. I have spent the last few hours looking around the help pages but nothing seems to be written about this. Thanks a lot! [[alternative HTML version deleted]]

Dear all, I have the following data in excel: day1 y 1 2 3 2 3 x1 0.2 0.3 0.4 0.3 0.2 x2 7 3.4 2 8 6 day2 y 2 4 3 2 2 x1 0.4 0.5 0.3 0.3 0.2 x2 7 8 9.1 6 5 I have the following problems: first of all, when I ask R to read the file (with the package xlsReadWrite and the command read.xls) it has a problem with the fact that the left most corner is labelled the same way, so in order for it