[R] keep average values and delete duplicate rows

[Jeff Newmiller]

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Sent from my phone. Please excuse my brevity.

fuckecon <iamstanhu at gmail.com> wrote:

>Hello experts,
>
>I am sorry that my subject line is confusing, because I am confused as
>nuts.
>Let me take a shot at explaining what I am trying to do.
>
>I have a data set of log GDP, education, democracy index, and a whole
>bunch
>of variables for every country from 1950 to  2000. Each country
>accounts for
>10 observations with each observation representing the mean GDP for
>each 5
>year interval.
>
>Example:
>
>Country  log GDP yr
>Canada	9.115211 1950
>Canada	9.205848 1955
>Canada	9.247975 1960
>Canada	9.429002 1965
>Canada	9.554069 1970
>Canada	9.719351 1975
>Canada	9.851376 1980
>Canada	9.937892 1985
>Canada	10.01457 1990
>Canada	10.04093 1995
>Canada	10.20005 2000
>USA       9.27824    1950
>USA       9.38968    1955
>USA       9.415136  1960
>USA       9.594625  1965
>USA       9.70207    1970
>USA       9.800418  1975
>USA       9.96813    1980
>USA       10.07001  1985
>USA       10.18331  1990
>USA       10.25446  1995
>USA       10.4131    2000
>
>For log GDP:
>
>I want to create a new object in R with one line for each country and 
>the
>average log GDP from the 10 5yr interval observations. With the subset
>I
>want to then create a table with 3 columns and 4 rows.
>
>(I have no idea how to write the codes to create the new object. Friend
>said
>something about conditional median.)
>
>Columns
>1) All countries
>2) High income countries
>3) Low income countries
>
>Rows
>1) Democracy index
>2) Log GDP
>3) Obs
>4) Countries
>
>To create a high and low income columns, I am using the median as the
>boundary. (i.e. high income for gdp > median of the mean for each
>country,
>low income for gdp <= median of the mean for each country.)
>
>I hope someone can understand what I am writing here and help me out
>with
>it.
>
>Thanks so much!
>
>
>
>
>
>--
>View this message in context:
>http://r.789695.n4.nabble.com/keep-average-values-and-delete-duplicate-rows-tp4647677.html
>Sent from the R help mailing list archive at Nabble.com.
>
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