# Bar and Column Charts

In bar charts values are plotted as either horizontal bars or vertical columns.

## Vertical, Horizontal and Stacked Bar Charts

Note

The following settings affect the different chart types.

Switch between vertical and horizontal bar charts by setting type to col or bar respectively.

When using stacked charts the overlap needs to be set to 100.

If bars are horizontal, x and y axes are reversed.

    from openpyxl import Workbook
    from openpyxl.chart import BarChart, Series, Reference

    wb = Workbook(write_only=True)
    ws = wb.create_sheet()

    rows = [
        ('Number', 'Batch 1', 'Batch 2'),
        (2, 10, 30),
        (3, 40, 60),
        (4, 50, 70),
        (5, 20, 10),
        (6, 10, 40),
        (7, 50, 30),
    ]

    for row in rows:
        ws.append(row)

    chart1 = BarChart()
    chart1.type = "col"
    chart1.style = 10
    chart1.title = "Bar Chart"
    chart1.y_axis.title = 'Test number'
    chart1.x_axis.title = 'Sample length (mm)'

    data = Reference(ws, min_col=2, min_row=1, max_row=7, max_col=3)
    cats = Reference(ws, min_col=1, min_row=2, max_row=7)
    chart1.add_data(data, titles_from_data=True)
    chart1.set_categories(cats)
    chart1.shape = 4
    ws.add_chart(chart1, "A10")

    from copy import deepcopy

    chart2 = deepcopy(chart1)
    chart2.style = 11
    chart2.type = "bar"
    chart2.title = "Horizontal Bar Chart"

    ws.add_chart(chart2, "G10")

    chart3 = deepcopy(chart1)
    chart3.type = "col"
    chart3.style = 12
    chart3.grouping = "stacked"
    chart3.overlap = 100
    chart3.title = 'Stacked Chart'

    ws.add_chart(chart3, "A27")

    chart4 = deepcopy(chart1)
    chart4.type = "bar"
    chart4.style = 13
    chart4.grouping = "percentStacked"
    chart4.overlap = 100
    chart4.title = 'Percent Stacked Chart'

    ws.add_chart(chart4, "G27")

    wb.save("bar.xlsx")

This will produce four charts illustrating the various possibilities.

## 3D Bar Charts

You can also create 3D bar charts

    from openpyxl import Workbook
    from openpyxl.chart import (
        Reference,
        Series,
        BarChart3D,
    )

    wb = Workbook()
    ws = wb.active

    rows = [
        (None, 2013, 2014),
        ("Apples", 5, 4),
        ("Oranges", 6, 2),
        ("Pears", 8, 3)
    ]

    for row in rows:
        ws.append(row)

    data = Reference(ws, min_col=2, min_row=1, max_col=3, max_row=4)
    titles = Reference(ws, min_col=1, min_row=2, max_row=4)
    chart = BarChart3D()
    chart.title = "3D Bar Chart"
    chart.add_data(data=data, titles_from_data=True)
    chart.set_categories(titles)

    ws.add_chart(chart, "E5")
    wb.save("bar3d.xlsx")

This produces a simple 3D bar chart