Data that's arranged in columns or rows on a worksheet can be plotted in an area chart. Area charts can be used to plot change over time and draw attention to the total value across a trend by showing the sum of the plotted values.
Spread.Sheets supports area, stacked area and 100% stacked area charts. Use the GC.Spread.Sheets.Charts.ChartType.area property to get the chart type.
You can add an area chart to Spread and change its style using the chart API.
var chart = sheet.charts.add('line', GC.Spread.Sheets.Charts.ChartType.area, 0, 100, 400, 300, 'A1:D4')
var title = chart.title()
title.text = 'DEMO';
Area: Area charts show trends over time.
Stacked area: Stacked area charts show the trend of the contribution of each value over time or other categorical data.
100% stacked area: One-hundred percent stacked area charts show the trend of the percentage that each value contributes over time or other categorical data.