[R] Create Pie chart from .csv file

[DonkeyRhubarb]

Hi all,

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.

This is part of my final software project which is due in one week. I would
very much appreciate any help.

Many thanks in advance

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