Description Usage Format Examples
A data.frame containing the regions for the 50 states plus the District of Columbia, indexed by state abbreviation.
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A data frame with 51 observations on the following 2 variables.
statea factor with levels AK AL AR AZ CA CO CT DC DE FL GA HI IA ID IL IN KS KY LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK OR PA RI SC SD TN TX UT VA VT WA WI WV WY
regiona factor with levels DC Midwest Northeast South West
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