text: """
  Parallel Coordinates Example
  ----------------------------
  A `Parallel Coordinates <https://en.wikipedia.org/wiki/Parallel_coordinates>`_
  chart is a chart that lets you visualize the individual data points by drawing
  a single line for each of them.
  Such a chart can be created in Altair by first transforming the data into a
  suitable representation.
  This example shows a parallel coordinates chart with the Iris dataset.
  """
  # category: other charts
  
  import altair as alt
  from vega_datasets import data
  
  source = data.iris()
  
  (
      alt.Chart(source)
      .transform_window(index="count()")
      .transform_fold(["petalLength", "petalWidth", "sepalLength", "sepalWidth"])
      .mark_line()
      .encode(
          x="key:N",
          y="value:Q",
          color="species:N",
          detail="index:N",
          opacity=alt.value(0.5),
      )
      .properties(width=500)
  )
  