Create univariate graph function

[scheidec]

Proposed syntax:

univariate_plot(tbl, x, xlab)

where

• tbl is the dataframe containing x
• x is the variable of interest
• xlab is the x-axis label which defaults to the label metadata but uses the variable name if empty

Outputs:

• If x is categorical --> bar graph where y-axis is labeled Percent (%) and bars are labeled with counts
• If x is continuous --> histogram