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Parallel coordinates plot in Python

How to make parallel coordinates plots in Python with Plotly.

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In [1]:

import plotly.express as px
df = px.data.iris()
fig = px.parallel_coordinates(df, color="species_id", labels={"species_id": "Species",
                "sepal_width": "Sepal Width", "sepal_length": "Sepal Length",
                "petal_width": "Petal Width", "petal_length": "Petal Length", },
                             color_continuous_scale=px.colors.diverging.Tealrose,
                             color_continuous_midpoint=2)
fig.show()

Parallel coordinates are richly interactive by default. Drag the lines along the axes to filter regions.

Select the columns to be represented with the dimensions parameter.

In [2]:

import plotly.express as px
df = px.data.iris()
fig = px.parallel_coordinates(df, color="species_id",
                              dimensions=['sepal_width', 'sepal_length', 'petal_width',
                                          'petal_length'],
                              color_continuous_scale=px.colors.diverging.Tealrose,
                              color_continuous_midpoint=2)
fig.show()

In [3]:

import plotly.graph_objects as go

fig = go.Figure(data=
    go.Parcoords(
        line_color='blue',
        dimensions = list([
            dict(range = [1,5],
                 constraintrange = [1,2], # change this range by dragging the pink line
                 label = 'A', values = [1,4]),
            dict(range = [1.5,5],
                 tickvals = [1.5,3,4.5],
                 label = 'B', values = [3,1.5]),
            dict(range = [1,5],
                 tickvals = [1,2,4,5],
                 label = 'C', values = [2,4],
                 ticktext = ['text 1', 'text 2', 'text 3', 'text 4']),
            dict(range = [1,5],
                 label = 'D', values = [4,2])
        ])
    )
)
fig.show()

Parallel coordinates are richly interactive by default. Drag the lines along the axes to filter regions and drag the axis names across the plot to rearrange variables.

In [4]:

import plotly.graph_objects as go

import pandas as pd

df = pd.read_csv("https://raw.githubusercontent.com/bcdunbar/datasets/master/iris.csv")

fig = go.Figure(data=
    go.Parcoords(
        line = dict(color = df['species_id'],
                   colorscale = [[0,'purple'],[0.5,'lightseagreen'],[1,'gold']]),
        dimensions = list([
            dict(range = [0,8],
                constraintrange = [4,8],
                label = 'Sepal Length', values = df['sepal_length']),
            dict(range = [0,8],
                label = 'Sepal Width', values = df['sepal_width']),
            dict(range = [0,8],
                label = 'Petal Length', values = df['petal_length']),
            dict(range = [0,8],
                label = 'Petal Width', values = df['petal_width'])
        ])
    )
)

fig.update_layout(
    plot_bgcolor = 'white',
    paper_bgcolor = 'white'
)

fig.show()

In [5]:

import plotly.graph_objects as go

import pandas as pd

df = pd.read_csv("https://raw.githubusercontent.com/bcdunbar/datasets/master/parcoords_data.csv")

fig = go.Figure(data=
    go.Parcoords(
        line = dict(color = df['colorVal'],
                   colorscale = 'Electric',
                   showscale = True,
                   cmin = -4000,
                   cmax = -100),
        dimensions = list([
            dict(range = [32000,227900],
                 constraintrange = [100000,150000],
                 label = "Block Height", values = df['blockHeight']),
            dict(range = [0,700000],
                 label = 'Block Width', values = df['blockWidth']),
            dict(tickvals = [0,0.5,1,2,3],
                 ticktext = ['A','AB','B','Y','Z'],
                 label = 'Cyclinder Material', values = df['cycMaterial']),
            dict(range = [-1,4],
                 tickvals = [0,1,2,3],
                 label = 'Block Material', values = df['blockMaterial']),
            dict(range = [134,3154],
                 visible = True,
                 label = 'Total Weight', values = df['totalWeight']),
            dict(range = [9,19984],
                 label = 'Assembly Penalty Wt', values = df['assemblyPW']),
            dict(range = [49000,568000],
                 label = 'Height st Width', values = df['HstW'])])
    )
)
fig.show()

New in 5.10

The color and opacity of unselected lines can be set with unselected. By setting opacity=0, you can hide the unselected lines. Here, we set the color to lightgray and the opacity to 0.5.

In [6]:

import plotly.graph_objects as go

fig = go.Figure(data=
    go.Parcoords(
        line_color='blue',
        dimensions = list([
            dict(range = [1,5],
                 constraintrange = [1,2], # change this range by dragging the pink line
                 label = 'A', values = [1,4]),
            dict(range = [1.5,5],
                 tickvals = [1.5,3,4.5],
                 label = 'B', values = [3,1.5]),
            dict(range = [1,5],
                 tickvals = [1,2,4,5],
                 label = 'C', values = [2,4],
                 ticktext = ['text 1', 'text 2', 'text 3', 'text 4']),
            dict(range = [1,5],
                 label = 'D', values = [4,2])
        ]),
        unselected = dict(line = dict(color = 'green', opacity = 0.5))
    )
)
fig.show()

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( ... )

from dash import Dash, dcc, html

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

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

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