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Examples
Categorical
Stacked Area

Stacked Area

stacked_area() over a long-form dataframe_mojo DataFrame (#743): one row per (series, category) pair, with value holding the cell.

Stacked Area

Usage 

from dataviz import stacked_area
from dataviz import save

def main() raises:
    var years: List[String] = ["2020", "2021", "2022", "2023", "2024"]
    var sources: List[String] = ["Wind", "Solar", "Hydro"]
    var output: List[List[Int]] = [
        [30, 40, 55, 60, 72],
        [10, 18, 30, 45, 66],
        [22, 23, 21, 24, 25],
    ]

    var c = stacked_area(
        years, sources, output, title="Renewable output (TWh)"
    )
    save(c, "docs/src/examples/out_stacked_area.svg")

See Data shapes for shared input conventions.

Args:

  • df: The frame to read.
  • category: The string column naming each category.
  • series: The string column naming each band.
  • value: The numeric column holding each cell.
  • smoothing: How much each band curves; see the list overload.
  • step: Step (stairs) interpolation; see the list overload.
  • theme: Full styling knobs beyond this function’s own parameters.
  • width: Pixel width of the returned Plot (.size()).
  • height: Pixel height of the returned Plot (.size()).
  • title: The chart’s title, shown above the plot.
  • subtitle: A line under the title.
  • x_title: The x-axis caption; defaults to category.
  • y_title: The y-axis caption; defaults to value.

Related

Related charts: Streamgraph · Candlestick

Relevant API: stacked_area

StreamgraphCandlestick