Dear Caesar, Welcome to R. This is a great opportunity for you to start learning R and practicing writing your own code. The first thing I would do is go to: http://cran.r-project.org/doc/manuals/R-intro.html and read the introduction to R manual. It has a lot of helpful information about using R.
You can pull up the help files/documentation on functions (which include detailed descriptions of the arguments for each function) by typing at the console ? followed by the varialbe name. For examle, to find information on how to use the mean() function: ?mean Some functions that might be helpful based on your description of your goals are: ?plot ?mean ?ave ?tapply You may also want to read through the R posting guide here: http://www.R-project.org/posting-guide.html where you will find that the R help list only accepts certain types of documents, so your attachment did not come through. Cheers, Josh On Mon, Mar 14, 2011 at 1:42 AM, Caesar Nkambule <cnkamb...@csir.co.za> wrote: > Good Day > > The attached document refers. I have recently attended an introduction > course to R, and now wish to apply the program into my work analysis. > > The spreadsheet contains water quality data sampled from different locations > within a catchment. > > I wish to group the variables per point (Point Name), Year (all samples per > year eg 1985 etc) These should be averages of each year. Lastly, I wish to > plot graphs of all the chemical variables from 1985-2006 to analyze the > trends in the concentration of water in the area. > > I would like to request your assistance in developing the required commands. > > Thanking you in advance. > > Warm regards > > > > Caesar Nkambule > Climate Studies & Modeling > CSIR Natural Resources & the Environment > Tel: 012 841 4439 > Fax: 012 841 2597 > Cell: 082921 6559 > Email: cnkamb...@csir.co.za > -- > This message is subject to the CSIR's copyright terms and conditions, e-mail > legal notice, and implemented Open Document Format (ODF) standard. > The full disclaimer details can be found at > http://www.csir.co.za/disclaimer.html. > > This message has been scanned for viruses and dangerous content by > MailScanner, > and is believed to be clean. MailScanner thanks Transtec Computers for their > support. > > > ______________________________________________ > 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. > > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ 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.
