Integrations#

import numpy as np

np.random.seed(1)

Data sources#

The .hvplot() plotting API supports a wide range of data sources. Most frequently, a special import can be executed to register the .hvplot accessor on a data type. For instance, importing hvplot.pandas registers the .hvplot accessor on Pandas DataFrame and Series objects, allowing to call df.hvplot.line().

Among the data sources introduced below, Pandas](https://pandas.pydata.org) is the only library that doesn’t need to be installed separately as it is a direct dependency of hvPlot.

Note

Supporting so many data sources is hard work! We are aware that the support for some of them isn’t as good as we would like. If you encounter any issue please report it on GitHub, we always welcome Pull Requests too!

Columnar/tabular#

Pandas#

.hvplot() supports Pandas DataFrame and Series objects.

import hvplot.pandas  # noqa
import pandas as pd

df_pandas = pd.DataFrame(np.random.randn(1000, 4), columns=list('ABCD')).cumsum()
df_pandas.head(2)
A B C D
0 1.624345 -0.611756 -0.528172 -1.072969
1 2.489753 -2.913295 1.216640 -1.834176 
# Pandas DataFrame
df_pandas.hvplot.line(height=150)

# Pandas Series
s_pandas = df_pandas['A']
s_pandas.hvplot.line(height=150)

Dask#

.hvplot() supports Dask DataFrame and Series objects.

import hvplot.dask  # noqa
import dask

df_dask = dask.dataframe.from_pandas(df_pandas, npartitions=2)
df_dask
Dask DataFrame Structure:
A B C D
npartitions=2
0 float64 float64 float64 float64
500 ... ... ... ...
999 ... ... ... ...
Dask Name: frompandas, 1 expression
# Dask DataFrame
df_dask.hvplot.line(height=150)

# Dask Series
s_dask = df_dask['A']
s_dask.hvplot.line(height=150)

GeoPandas#

.hvplot() supports GeoPandas GeoDataFrame objects.

import hvplot.pandas  # noqa
import geopandas as gpd

p_geometry = gpd.points_from_xy(
    x=[12.45339, 12.44177, 9.51667, 6.13000],
    y=[41.90328, 43.93610, 47.13372, 49.61166],
    crs='EPSG:4326'
)
p_names = ['Vatican City', 'San Marino', 'Vaduz', 'Luxembourg']
gdf = gpd.GeoDataFrame(dict(name=p_names), geometry=p_geometry)
gdf.head(2)
name geometry
0 Vatican City POINT (12.45339 41.90328)
1 San Marino POINT (12.44177 43.9361) 
# GeoPandas GeoDataFrame
gdf.hvplot.points(geo=True, tiles='CartoLight', frame_height=150, data_aspect=0.5)

Ibis#

Ibis is the “portable Python dataframe library”, it provides a unified interface to many data backends (e.g. DuckDB, SQLite, SnowFlake, Google BigQuery). .hvplot() supports Ibis Expr objects.

import hvplot.ibis  # noqa
import ibis

table = ibis.memtable(df_pandas.reset_index())
table

InMemoryTable
  data:
    PandasDataFrameProxy:
           index          A          B          C          D
      0        0   1.624345  -0.611756  -0.528172  -1.072969
      1        1   2.489753  -2.913295   1.216640  -1.834176
      2        2   2.808792  -3.162665   2.678748  -3.894316
      3        3   2.486375  -3.546720   3.812517  -4.994207
      4        4   2.313947  -4.424578   3.854731  -4.411392
      ..     ...        ...        ...        ...        ...
      995    995  14.422083 -48.258487  19.318585  63.861029
      996    996  13.814368 -47.528673  18.431398  63.938357
      997    997  13.887784 -47.112647  16.552198  64.513816
      998    998  13.989847 -45.928343  15.757355  64.387913
      999    999  13.029500 -46.772256  16.385696  64.925127

      [1000 rows x 5 columns]

# Ibis Expr
table.hvplot.line(x='index', height=150)

Polars#

Note

Added in version 0.9.0.

Important

While other data sources like Pandas or Dask have built-in support in HoloViews, as of version 1.17.1 this is not yet the case for Polars. You can track this issue to follow the evolution of this feature in HoloViews. Internally hvPlot simply selects the columns that contribute to the plot and casts them to a Pandas object using Polars’ .to_pandas() method.

import hvplot.polars  # noqa 
import polars

df_polars = polars.from_pandas(df_pandas)
df_polars.head(2)
shape: (2, 4)
ABCD
f64f64f64f64
1.624345-0.611756-0.528172-1.072969
2.489753-2.9132951.21664-1.834176

.hvplot() supports Polars DataFrame, LazyFrame and Series objects.

# Polars DataFrame
df_polars.hvplot.line(y=['A', 'B', 'C', 'D'], height=150)

# Polars LazyFrame
df_polars.lazy().hvplot.line(y=['A', 'B', 'C', 'D'], height=150)

# Polars Series
df_polars['A'].hvplot.line(height=150)

DuckDB#

Note

Added in version 0.11.0.

import numpy as np
import pandas as pd

df_pandas = pd.DataFrame(np.random.randn(1000, 4), columns=list('ABCD')).cumsum()
df_pandas.head(2)
A B C D
0 -0.140371 0.141642 0.311969 0.769085
1 0.443915 1.930234 0.287338 2.259375 
import hvplot.duckdb  # noqa 
import duckdb

connection = duckdb.connect(':memory:')
relation = duckdb.from_df(df_pandas, connection=connection)
relation.to_view("example_view");

.hvplot() supports DuckDB DuckDBPyRelation and DuckDBConnection objects.

relation.hvplot.line(y=['A', 'B', 'C', 'D'], height=150)

DuckDBPyRelation is a bit more optimized because it handles column subsetting directly within DuckDB before the data is converted to a pd.DataFrame.

So, it’s a good idea to use the connection.sql() method when possible, which gives you a DuckDBPyRelation, instead of connection.execute(), which returns a DuckDBPyConnection.

sql_expr = "SELECT * FROM example_view WHERE A > 0 AND B > 0"
connection.sql(sql_expr).hvplot.line(y=['A', 'B'], hover_cols=["C"], height=150)  # subsets A, B, C

Alternatively, you can directly subset the desired columns in the SQL expression.

sql_expr = "SELECT A, B, C FROM example_view WHERE A > 0 AND B > 0"
connection.execute(sql_expr).hvplot.line(y=['A', 'B'], hover_cols=["C"], height=150)

Rapids cuDF#

Important

Rapids cuDF is a Python GPU DataFrame library. Neither hvPlot’s nor HoloViews’ test suites currently run on a GPU part of their CI, as of versions 0.9.0 and 1.17.1, respectively. This is due to the non availability of machines equipped with a GPU on the free CI system we rely on (Github Actions). Therefore it’s possible that support for cuDF gets degraded in hvPlot without us noticing it immediately. Please report any issue you might encounter.

.hvplot() supports cuDF DataFrame and Series objects.

Fugue#

Experimental

Fugue support, added in version 0.9.0, is experimental and may change in future versions.

hvPlot adds the hvplot plotting extension to FugueSQL.

import hvplot.fugue  # noqa
import fugue

fugue.api.fugue_sql(
    """
    OUTPUT df_pandas USING hvplot:line(
        height=150,
    )
    """
)