[R] Create Pie chart from .csv file

[Richard.Cotton at hsl.gov.uk]

> I am looking to create a pie chart from a given column in a .csv file. 
> 
> My class variables are as follows:
> 
> entry_type,   uniquekey,   types, title,    url, abstract, journal, 
> author, month,
> year, howpublished
> 
> So say I want to export a pie chart that groups together all  entries 
under
> 'types' e.g. 3 x statistics 2x education etc. Im looking to have a 
piechart
> represent this graphically that shows which type of entry is in most
> frequently. Preferably I'd like to export to a PDF chart and while I can 
do
> this by typing variables directly into the R console, I cannot manage it
> from a .csv file.
> 
> If you cannot help me with this specific problem, just knowing how to 
create
> a generic pie chart would be a great help.

Split the problem up into different stages.

1. Read in your data form the csv file.
?read.csv

2. Plot something.
?pie if you really must, but a bar chart will almost certainly be better. 
See ?barplot and ?barchart (lattice package).

3. Export the graph to PDF.
?pdf

Regards,
Richie.

Mathematical Sciences Unit
HSL



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