Grouped Bar Chart — Plotly

A grouped bar chart that displays multiple bars side-by-side for each category, enabling direct comparison of values across different groups within the same categorical dimension. This visualization excels at showing how different groups perform relative to each other across multiple categories, making patterns and differences immediately apparent. Grouped bar charts are essential for comparative analysis where you need to track multiple series against the same set of categories.

Grouped Bar Chart rendered with Plotly

Renders

Python source (Plotly)

""" anyplot.ai
bar-grouped: Grouped Bar Chart
Library: plotly 6.9.0 | Python 3.13.14
Quality: 92/100 | Updated: 2026-08-05
"""

import os

import plotly.graph_objects as go


# Theme tokens
THEME = os.getenv("ANYPLOT_THEME", "light")
PAGE_BG = "#FAF8F1" if THEME == "light" else "#1A1A17"
ELEVATED_BG = "#FFFDF6" if THEME == "light" else "#242420"
INK = "#1A1A17" if THEME == "light" else "#F0EFE8"
INK_SOFT = "#4A4A44" if THEME == "light" else "#B8B7B0"
GRID = "rgba(26,26,23,0.15)" if THEME == "light" else "rgba(240,239,232,0.15)"

# Imprint categorical palette — device types are abstract groups, canonical order applies
COLORS = ["#009E73", "#C475FD", "#4467A3"]

# Data: monthly website sessions (thousands) by traffic source, split by device type
categories = ["Organic Search", "Direct", "Social Media", "Paid Search", "Referral"]
devices = {"Desktop": [420, 210, 96, 185, 132], "Mobile": [312, 168, 224, 148, 90], "Tablet": [64, 47, 58, 42, 31]}

# Create figure
fig = go.Figure()

for i, (device, values) in enumerate(devices.items()):
    fig.add_trace(
        go.Bar(
            name=device,
            x=categories,
            y=values,
            marker={"color": COLORS[i], "line": {"color": PAGE_BG, "width": 1.5}},
            text=values,
            textposition="outside",
            textfont={"size": 11, "color": INK},
            hovertemplate=(f"<b>{device}</b><br>Source: %{{x}}<br>Sessions: %{{y}}K<br><extra></extra>"),
        )
    )

# Callout: Social Media is the only source where mobile sessions outpace desktop
fig.add_annotation(
    x="Social Media",
    y=224,
    text="Social skews mobile-first —<br>2.3× desktop sessions",
    showarrow=True,
    arrowhead=2,
    arrowcolor=INK_SOFT,
    ax=110,
    ay=-25,
    font={"size": 11, "color": INK},
    bgcolor=ELEVATED_BG,
    bordercolor=INK_SOFT,
    borderwidth=1,
    borderpad=6,
)

# Layout
fig.update_layout(
    autosize=False,
    title={
        "text": "bar-grouped · python · plotly · anyplot.ai",
        "font": {"size": 19, "color": INK},
        "x": 0.5,
        "xanchor": "center",
    },
    xaxis={
        "title": {"text": "Traffic Source", "font": {"size": 15, "color": INK}},
        "tickfont": {"size": 12, "color": INK_SOFT},
        "showgrid": False,
        "linecolor": INK_SOFT,
        "zerolinecolor": INK_SOFT,
        "mirror": False,
    },
    yaxis={
        "title": {"text": "Monthly Sessions (thousands)", "font": {"size": 15, "color": INK}},
        "tickfont": {"size": 12, "color": INK_SOFT},
        "gridcolor": GRID,
        "gridwidth": 1,
        "linecolor": INK_SOFT,
        "zerolinecolor": INK_SOFT,
        "mirror": False,
    },
    barmode="group",
    bargap=0.2,
    bargroupgap=0.1,
    paper_bgcolor=PAGE_BG,
    plot_bgcolor=PAGE_BG,
    legend={
        "font": {"size": 12, "color": INK_SOFT},
        "bgcolor": ELEVATED_BG,
        "borderwidth": 0,
        "orientation": "h",
        "yanchor": "bottom",
        "y": 1.02,
        "xanchor": "center",
        "x": 0.5,
    },
    margin={"l": 90, "r": 40, "t": 110, "b": 70},
    hovermode="x unified",
)

# Save outputs
script_dir = os.path.dirname(os.path.abspath(__file__))
fig.write_image(os.path.join(script_dir, f"plot-{THEME}.png"), width=800, height=450, scale=4)
fig.write_html(os.path.join(script_dir, f"plot-{THEME}.html"), include_plotlyjs="cdn")

Retrieve this implementation

Runnable source as JSON, for any HTTP client: https://api.anyplot.ai/specs/bar-grouped/plotly/code. Any spec id and library id listed in llms-full.txt fit the same URL shape; every URL below is complete and callable.

{
  "spec_id": "bar-grouped",
  "language": "python",
  "library": "plotly",
  "page": "https://anyplot.ai/bar-grouped/python/plotly",
  "hub": "https://anyplot.ai/bar-grouped",
  "code_json": "https://api.anyplot.ai/specs/bar-grouped/plotly/code",
  "spec_json": "https://api.anyplot.ai/specs/bar-grouped",
  "render_light_png": "https://storage.googleapis.com/anyplot-images/plots/bar-grouped/python/plotly/plot-light.png",
  "render_dark_png": "https://storage.googleapis.com/anyplot-images/plots/bar-grouped/python/plotly/plot-dark.png",
  "interactive_light_html": "https://storage.googleapis.com/anyplot-images/plots/bar-grouped/python/plotly/plot-light.html",
  "interactive_dark_html": "https://storage.googleapis.com/anyplot-images/plots/bar-grouped/python/plotly/plot-dark.html",
  "quality_score": 92.0,
  "license": "MIT",
  "guide": "https://anyplot.ai/llms.txt"
}

Part of Grouped Bar Chart on anyplot.ai.

Other implementations