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- # set wd
- setwd("~/Dropbox/classes/pols-209")
- # load packages
- library(dplyr)
- library(ggplot2)
- # load data
- leg <- readRDS("data/state-legislators.rds") # read data set
- # quick look
- glimpse(leg)
- # create a grouped df
- grouped_df <- group_by(leg, party, year, state)
- # summarize data set by group
- smry <- summarize(grouped_df,
- average_ideology = mean(ideology_score))
- ggplot(smry, aes(x = year, y = average_ideology, group = state)) +
- geom_line(alpha = 0.5) +
- facet_wrap(~ party)
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