Mixed Subplots in Python

How to make mixed subplots in Python with Plotly.


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Mixed Subplot

In [1]:
import plotly.graph_objects as go
from plotly.subplots import make_subplots

import pandas as pd

# read in volcano database data
df = pd.read_csv(
    "https://raw.githubusercontent.com/plotly/datasets/master/volcano_db.csv",
    encoding="iso-8859-1",
)

# frequency of Country
freq = df
freq = freq.Country.value_counts().reset_index().rename(columns={"index": "x"})

# read in 3d volcano surface data
df_v = pd.read_csv("https://raw.githubusercontent.com/plotly/datasets/master/volcano.csv")

# Initialize figure with subplots
fig = make_subplots(
    rows=2, cols=2,
    column_widths=[0.6, 0.4],
    row_heights=[0.4, 0.6],
    specs=[[{"type": "scattergeo", "rowspan": 2}, {"type": "bar"}],
           [            None                    , {"type": "surface"}]])

# Add scattergeo globe map of volcano locations
fig.add_trace(
    go.Scattergeo(lat=df["Latitude"],
                  lon=df["Longitude"],
                  mode="markers",
                  hoverinfo="text",
                  showlegend=False,
                  marker=dict(color="crimson", size=4, opacity=0.8)),
    row=1, col=1
)

# Add locations bar chart
fig.add_trace(
    go.Bar(x=freq["x"][0:10],y=freq["Country"][0:10], marker=dict(color="crimson"), showlegend=False),
    row=1, col=2
)

# Add 3d surface of volcano
fig.add_trace(
    go.Surface(z=df_v.values.tolist(), showscale=False),
    row=2, col=2
)

# Update geo subplot properties
fig.update_geos(
    projection_type="orthographic",
    landcolor="white",
    oceancolor="MidnightBlue",
    showocean=True,
    lakecolor="LightBlue"
)

# Rotate x-axis labels
fig.update_xaxes(tickangle=45)

# Set theme, margin, and annotation in layout
fig.update_layout(
    template="plotly_dark",
    margin=dict(r=10, t=25, b=40, l=60),
    annotations=[
        dict(
            text="Source: NOAA",
            showarrow=False,
            xref="paper",
            yref="paper",
            x=0,
            y=0)
    ]
)

fig.show()

Reference

See https://plotly.com/python/reference/ for more information and chart attribute options!

What About Dash?

Dash is an open-source framework for building analytical applications, with no Javascript required, and it is tightly integrated with the Plotly graphing library.

Learn about how to install Dash at https://dash.plot.ly/installation.

Everywhere in this page that you see fig.show(), you can display the same figure in a Dash application by passing it to the figure argument of the Graph component from the built-in dash_core_components package like this:

import plotly.graph_objects as go # or plotly.express as px
fig = go.Figure() # or any Plotly Express function e.g. px.bar(...)
# fig.add_trace( ... )
# fig.update_layout( ... )

import dash
import dash_core_components as dcc
import dash_html_components as html

app = dash.Dash()
app.layout = html.Div([
    dcc.Graph(figure=fig)
])

app.run_server(debug=True, use_reloader=False)  # Turn off reloader if inside Jupyter