Slope Graph

This example shows how to make Slope Graph.

Method syntax

import altair as alt
from vega_datasets import data

source = data.barley()

alt.Chart(source).mark_line().encode(
    x='year:O',
    y='median(yield)',
    color='site'
)

Attribute syntax

import altair as alt
from vega_datasets import data

source = data.barley()

alt.Chart(source).mark_line().encode(
    x='year:O',
    y='median(yield)',
    color='site'
)
# No channel encoding options are specified in this chart
# so the code is the same as for the method-based syntax.