var mapping = {
  // columns names for "value" metrics (y-axis), and a title for the size/weight value to use on the y-axis
  startValue: "deathRate_before",
  endValue: "deathRate_after",
  titleValue: "Fetal Death Rate",

  // column names for "weight" metrics (x-axis), and a title for the size/weight variable to use on the x-axis
  startWeight: "numBabiesBorn_before",
  endWeight: "numBabiesBorn_after",
  titleWeight: "Number of Babies Born",

  // column to segment the data into subgroups
  segmentName: "birthweight",
  // if you want to filter by another variable, type the name of that column here - and the category you want to filter as 'filterCat', as shown in the options that are commented out
  filterName: "",
  filterCat: "",
  //filterName: "state",
  //filterCat: "Ohio"
}

var scaleOptions = {
  // set scale (either 'linear' or 'log')
  weightScale: "log",
  valueScale: "log"
}