Hi [EMAIL PROTECTED] napsal dne 13.08.2007 14:04:50:
> Dear all, > > > I have 4 sites and want to determine how different they are from each other. > For this I have decided to use R though it seems a bit daunting to learn. > I have read data in from a CSV the structure is : > > Species1 Species2 Species3 > > Site1 4 4 7 > Site2 3 1 0 > Site3 0 99 6 > Site4 75 3 33 > > There are many more species than shown above this is just an example. Here are > the questions. > > How do I read one row of data so as to load site2 into a variable called site2? ?read.table and other read..... commands. Do not work with variables but with data frames. > > Once I plot a graph using ordiplot how do I extract it from R so that I can > put it into a Word for Windows document? 1. save a graph from menu 2. use ?png, ?jpeg and others to see how to output graph to files (devices) > > Once I have the data in varables I hope to use designdist and Sřrensen to > discover diversity indices. I had a crack at this once but because I had sites > as the columns it didn't work. Now that I think I have the data correct I can proceed. > > x Input data (this will be the whole data set that I read into my variable > 'allSites' from a CSV.)? > > The variables for Sřrensen will contain terms J for shared quantity, A and B > for totals, N for the number of rows (sites) and P for the number of columns > (species) and 'Binary' as the term. > > How do I get the shared number of species for each row? > > Probably very beginner type questions but I want to get on an haven't yet > found the answers in my trawl throgh the help. Is there a book that I can buy > to learn R? look at CRAN. You can find various books from beginners to quite advanced. e.g. P.Dalgaard Introductory statistics with R isd quite good for first steps. Or you can consult Rtips from Paul Johnson. (Just type statsrus into Google). Good idea is also to look into posting guide. Regards Petr > > All the best, > Richard Price > MSc student University Birmingham. > > > > [[alternative HTML version deleted]] > > ______________________________________________ > 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 > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.
