Example Roassal Moose script for graphing Ebola data in the playground

ebola-graph.st

tab := RTTabTable new input: (ZnEasy
  get: 'https://raw.githubusercontent.com/cmrivers/ebola/master/country_timeseries.csv')
  contents usingDelimiter: $,.
tab removeFirstRow.
tab replaceEmptyValuesWith: '0' inColumns: (2 to: 12) asArray.
tab convertColumnsAsInteger: (2 to: 12) asArray.
tab convertColumnAsDateAndTime: 1.
tab replaceZeroWithCumulativeValuesInColumns: (2 to:12) asArray.
data := tab values reversed.

minEntry := data minFor: #first.

b := RTCharterBuilder new.
b extent: 400@200.
b shape ellipse size:0.
b points: data.
b connectDotColor: Color blue.
b allY: [ :v | v at: 3 ].
b allX: [ :v | v first julianDayNumber - minEntry first julianDayNumber ].

b points: data.
b connectDotColor: Color green.
b allY: [ :v | v at: 4 ].
b allX: [ :v | v first julianDayNumber - minEntry first julianDayNumber ].

b axisConfiguration
labelRotation: -30;
labelConvertion: [ :v | (Date julianDayNumber: v + minEntry first julianDayNumber) ].
b axisX.

b resetAxisConfiguration.
b axisY.
b build.

lb := RTLegendBuilder new.
lb view: b view.
lb addText: 'Ebola cases'.
lb addColor: Color blue text: 'Guinea'.
lb addColor: Color green text: 'Liberia'.
lb build.