[R] Odp: Very new - beginners questions
petr.pikal at precheza.cz
Mon Aug 13 15:10:40 CEST 2007
r-help-bounces at stat.math.ethz.ch napsal dne 13.08.2007 14:04:50:
> Dear all,
> I have 4 sites and want to determine how different they are from each
> For this I have decided to use R though it seems a bit daunting to
> 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.
> the questions.
> How do I read one row of data so as to load site2 into a variable
?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
> 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
> Once I have the data in varables I hope to use designdist and Sřrensen
> discover diversity indices. I had a crack at this once but because I had
> 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
> 'allSites' from a CSV.)?
> The variables for Sřrensen will contain terms J for shared quantity, A
> for totals, N for the number of rows (sites) and P for the number of
> (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
> found the answers in my trawl throgh the help. Is there a book that I
> 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.
> All the best,
> Richard Price
> MSc student University Birmingham.
> [[alternative HTML version deleted]]
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide
> and provide commented, minimal, self-contained, reproducible code.
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