Hi Sachin, That's OK - you don't need to know the dimensions up front and you can add new vectors, or elements to an existing vector, as required.
# empty list to start with X <- list() # we get a vector v1 <- c(1, 2, 3, 4, 5) # add it to the ragged array X <- c(X, list(v1)) # get another couple of vectors and add them as well v2 <- c(9, 8, 7, 6) v3 <- c(2, 4, 6, 8) X <- c(X, list(v2, v3)) # add some more elements to the first vector in X - note double brackets to access # the vector directly X[[1]] <- c(X[[1]], 4, 3, 2, 1) Michael On 10 November 2010 16:46, <sachinthaka.abeyward...@allianz.com.au> wrote: > Hi Michael, > > Thanks for that. Its a starting point I guess. But what if I didn't know > the length of the outer vector is? (i.e. all dimensions are variable). Or > for that matter I don't actually know what the initial dimensions are going > to be. All of it is created within a for loop. > > I was hoping for something like a C++ vector, where you can specify > vector<vector<int>> myarray. I'm sure lists is definitely the way to go, > but not sure how to implement it. > > Cheers, > Sachin > > --- Please consider the environment before printing this email --- > > Allianz - Best General Insurance Company of the Year 2010* > Allianz - General Insurance Company of the Year 2009+ > > * Australian Banking and Finance Insurance Awards > + Australia and New Zealand Insurance Industry Awards > > This email and any attachments has been sent by Allianz Australia Insurance > Limited (ABN 15 000 122 850) and is intended solely for the addressee. It is > confidential, may contain personal information and may be subject to legal > professional privilege. Unauthorised use is strictly prohibited and may be > unlawful. If you have received this by mistake, confidentiality and any legal > privilege are not waived or lost and we ask that you contact the sender and > delete and destroy this and any other copies. In relation to any legal use > you may make of the contents of this email, you must ensure that you comply > with the Privacy Act (Cth) 1988 and you should note that the contents may be > subject to copyright and therefore may not be reproduced, communicated or > adapted without the express consent of the owner of the copyright. > Allianz will not be liable in connection with any data corruption, > interruption, delay, computer virus or unauthorised access or amendment to > the contents of this email. If this email is a commercial electronic message > and you would prefer not to receive further commercial electronic messages > from Allianz, please forward a copy of this email to > unsubscr...@allianz.com.au with the word unsubscribe in the subject header. > > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
