"""Smoother graph."""
from .signatures import bivariate_recipe
import altair as alt
from autosig import autosig, param, Signature
[docs]@autosig(
bivariate_recipe
+ Signature(
window=param(
default=None,
position=3,
docstring="""int
The size of the smoothing window""",
),
interquartile_area=param(
default=True,
position=4,
docstring="""interquartile_area: bool
Whether to plot the IRQ as an area""",
),
)
)
def smoother(
data=None, x=0, y=1, window=None, interquartile_area=True, height=600, width=800
):
"""Generate a smooth line plot with optional IRQ shading area."""
window = data.shape[0] // 4 if window is None else int(window)
_data = data.sort_values(by=x)
_data[x] = _data[x].rolling(window).median()
_data["median"] = _data[y].rolling(window).median()
chart_line = (
alt.Chart(height=height, width=width).mark_line().encode(x=x, y="median")
)
if interquartile_area:
_data["q1"] = _data[y].rolling(window).quantile(0.25)
_data["q3"] = _data[y].rolling(window).quantile(0.75)
chart_area = (
alt.Chart(height=height, width=width)
.mark_area(opacity=0.2)
.encode(x=x, y=alt.Y("q1", title=y), y2="q3")
)
chart = chart_line + chart_area
else:
chart = chart_line
return chart.properties(data=_data)