library(ggplot2)
library(tidyverse)
library(data.table)
########################################################################
# TASK: barplots to colour nssnps by chosen aa_property
########################################################################
aa_prop_bp <- function(plotdf
                       , position_colname
                       , fill_colname
                       , fill_colours
                       , leg_name = "LEGEND"){
  mp = ggplot(df, aes(x = as.factor(eval(parse(text = pos_colname)))
                      #, y = ..count..
                      , fill = eval(parse(text = fill_colname))
  )) +
    geom_bar(position = 'identity') +
    scale_fill_manual(values = fill_colours
                      , name = leg_name)
  return(mp)
}