Table of bivariate correlations
race_cand_cors(data, cand_cols, race_cols)
a dataframe of correlation coefficients describing to correlation between the racial proportion of a precinct and the vote share of each candidate.
A data.frame() object containing precinct-level turnout data by race and candidate
A character vector listing the column names for turnout for each candidate
A character vector listing the column names for turnout by race