On May 13, 2011, at 10:25 PM, Me wrote:
OK, I have another question if you guys don't mind helping again. I
have all
of the information I need in a csv file, and I've read the csv file
into R,
but I'm having some trouble manipulating it. In the past, I've always
manipulated data that was premade for me in the class I'm in, so I
think I'm
probably formatting the csv file wrong.
The data is a list of countries with information about their inbound
tourism, homicide rate and GNI per capita. The file has four
columns, with
the first being the name of the country, then the year (all 2008 in
this
case), then homicide rate, then GNI, then inbound tourism.
My problem comes when I'm trying to separate the different the
different
categories. For example, I'll try to isolate GNI per capita by writing
Data$GNI, but R doesn't seem to keep track of which country is
assigned with
which GNI score.
Not likely. More likely is that you have forgotten how to perform
basic operations on dataframes. Type this at the console:
?Extract
When I write View(Data$GNI), I just get a table that has
two columns: one column is the numbers 1 through 67, and the second
is the
GNI per capita for each country that is that number in the list.
You should read the Introduction to R and work through the examples.
At that point one would hope that you realize that you are just
getting a vector of GNI from within your Data object.
Can anyone help me correctly format the csv file or tell me what
else I'm
doing wrong? Thanks a lot.
The problem would appear to be that you do not understand how to
access an object and its components. I suspect you are no longer stuck
at the point of getting a csv file. If I am correct then just typing:
Data should produce the full table
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David Winsemius, MD
West Hartford, CT
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