enh(bokeh): Inspect timeseries

[hoxbro]

Disabling the overlay_aggregate fastpath when we have a selector. A bit of formatting in the applies as it was pretty complicated already.

Code

import itertools

import datashader as ds
import numpy as np
import pandas as pd
import panel as pn

import holoviews as hv
from holoviews.operation.datashader import datashade, dynspread, rasterize

hv.extension("bokeh")

num = 10000
seed = np.random.default_rng(1)


def y(val):
    y = seed.normal(0, 1, num).cumsum()
    if val == 1:
        y[num // 2 : num // 2 + num // 10] = np.nan
    return y + val * 100  # No overlap


dists = [
    pd.DataFrame(
        {
            "x": np.arange(num),
            "y": y(val),
            "val": val,
            "cat": cat,
        }
    )
    for val, cat in [
        (0, "c0"),
        (1, "c1"),
    ]
]

df = pd.concat(dists, ignore_index=True)
curves = hv.Curve(df).groupby("cat").opts(tools=["hover"])
overlay = curves.overlay()


def dynspread_datashade(*args, **kwargs):
    return dynspread(datashade(*args, **kwargs))


def dynspread_rasterize(*args, **kwargs):
    return dynspread(rasterize(*args, **kwargs))


def rasterize_linewidth(*args, **kwargs):
    return rasterize(*args, **dict(kwargs, line_width=10))


def datashade_linewidth(*args, **kwargs):
    return datashade(*args, **dict(kwargs, line_width=10))


ops = (
    rasterize,
    dynspread_rasterize,
    rasterize_linewidth,
    datashade,
    dynspread_datashade,
    datashade_linewidth,
)
aggs = (ds.count(self_intersect=False), ds.by("cat", ds.count(self_intersect=False)))
sels = (None, ds.min("val"))
combinations = itertools.product(ops, aggs, sels)
plots = []
for op, agg, sel in combinations:
    title = f"{op.__name__.replace('_','+')}(agg={type(agg).__name__}, sel={type(sel).__name__ if sel else None})"
    plot = op(overlay, aggregator=agg, selector=sel).opts(
        tools=["hover"], title=title, width=400, height=400
    )
    plots.append(plot)

pn.panel(hv.Layout(plots).cols(4).opts(shared_axes=False)).servable()

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.82%. Comparing base (02258ce) to head (c0c495a).
Report is 21 commits behind head on main.

Files with missing lines	Patch %	Lines
holoviews/operation/datashader.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6479      +/-   ##
==========================================
+ Coverage   88.79%   88.82%   +0.02%     
==========================================
  Files         323      324       +1     
  Lines       68940    68990      +50     
==========================================
+ Hits        61216    61278      +62     
+ Misses       7724     7712      -12     

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[philippjfr]

Small comment, otherwise happy with this.