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Exercise: Map the Population of US States in 2010.

In lesson 2 we used two objects to analyze state demographics:


?df_pop_state, which has data from the 2012 5-year America Community Survey (ACS)
?df_state_demographics, which has data from the 2013 5-year ACS
To get data from other years you need to access the US Census API. To do that:

Fill out this form to get a Census API Key. They will email you a key.
When you get your key, type the following in R:

To get data from other years you need to access the US Census API. To do that:

Fill out this form to get a Census API Key. They will email you a key.
When you get your key, type the following in R:

1. library(acs)
   
2. 
   
3. api.key.install("<your key>")

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1. library(choroplethr)
   
2. 
   
3. ?get_state_demographics
   
4. df_2010_demographics = get_state_demographics(2010)

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Creating a map of 2010 population estimates is now simple:

1. df_2010_demographics$value =
   
2.     df_2010_demographics$total_population
   
3. 
   
4. state_choropleth(df_2010_demographics,
   
5.     title = “2010 State Population Estimates”,
   
6.     legend = “Population”)

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Creating a map of 2010 population estimates is now simple:

df_2010_demographics$value =     df_2010_demographics$total_populationstate_choropleth(df_2010_demographics,    title = “2010 State Population Estimates”,     legend = “Population”)

Exercise: Make a map showing the Percent Hispanic of Counties in Texas in 2011.



We will get the data with the function ?get_county_demographics, which works analogously to get_state_demographics: