Given my own language inadequacies (I speak only one), I must, of necessity, refrain from criticizing the multilingual. However, in this one instance my sensibilities have been overwhelmed: "symmetric" , please :-) .
Incidentally, you may find that file.path() is also useful. Cheers, Bert -- Bert Gunter Genentech Non-Clinical Statistics South San Francisco, CA "The business of the statistician is to catalyze the scientific learning process." - George E. P. Box > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Leonardo Sepulveda Durán > Sent: Friday, August 12, 2005 7:44 AM > To: r-help@stat.math.ethz.ch > Subject: [R] evaluating string variables > > Hello!!! > > I have a folder (C:/R/) with matrix files, named by number, i.e. > 0.mat, 1.mat,...,1250.mat. In this case, they are 5x5 simetric > matrices. I would like to compute a property for each matrix and put > calculated values into a data frame for posterior ploting and > printing. Below there is an example for 7 matrices (0.mat..6.mat) > > #define data frame > L <- data.frame(frame=numeric(7), L=numeric(7)) > f0<-1/(5*(5-1)) # first variable for computation > > #loop over matrices, Open it , calculate property and put > into data frame > for(i in 0:6){ > m<-matrix(scan('C:/R/i.mat', n=5*5),5,5, byrow=TRUE) # > load matrix > f1<-geodist(m) > > f2<-sum(colSums(f1$gdist)) > > l <-f0*f2 > > # Calculate property > L[i+1, ]<-c(i,l) > > # Fill data frame > } > > but the matrix cannot be loaded, because it try to open a file named > "i.mat". I don`t know how to loop with a counter named 'i', and use it > to define the name of the file too. How can i do it? I have not found > the way. > > Leonardo > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
