xlsxwriter - 使用 xlswriter 向条形图添加趋势线

Question

我正在尝试创建带有趋势线的条形图。我可以在 excel 中执行此操作，并希望使该过程自动化。xlswriter 非常易于使用，我已经复制了条形图，它只是对我不起作用的趋势线。似乎在该行中添加了 2 个元素，并在每个堆栈的顶部添加了一个附加栏。

这是创建左侧图表的代码

import xlsxwriter

# create worbook, workseet and chart
workbook = xlsxwriter.Workbook("Example.xlsx")
worksheet = workbook.add_worksheet()
chart1 = workbook.add_chart({'type': 'column', 'subtype': 'stacked'})

# Add the worksheet data
headings = ['Model 1', 'Model 2', 'Capacity']
data = [
    [10, 40, 50, 20, 10, 50],
    [30, 60, 70, 50, 40, 30],
    [20, 30, 40, 40, 30, 30]
]

worksheet.write_row('A1', headings)
worksheet.write_column('A2', data[0])
worksheet.write_column('B2', data[1])
worksheet.write_column('C2', data[2])

# Configure the first series.
chart1.add_series({
    'name':       '=Sheet1!$A$1',
    'values':     '=Sheet1!$A$2:$A$7',
})

# Configure the first series.
chart1.add_series({
    'name':       '=Sheet1!$B$1',
    'values':     '=Sheet1!$B$2:$B$7',
})

chart1.add_series({
    'name':      '=Sheet1!$C$1',
    'values':    '=Sheet1!$C$2:$C$7',
    'trendline': {'type': 'linear'},
})

# Set an Excel chart style.
chart1.set_style(11)

# Add a chart title
chart1.set_title ({'name': 'xlsxwriter chart'})

# Insert the chart into the worksheet (with an offset).
worksheet.insert_chart('F1', chart1)

# Finally, close the Excel file
workbook.close()

条形图选择我尝试插入的数据作为趋势线。任何帮助，将不胜感激。

Answer 1

看起来您要做的是添加辅助折线图而不是趋势线。您可以使用 XlsxWriter chart.combine()方法执行此操作。

像这样：

import xlsxwriter

# create worbook, workseet and chart
workbook = xlsxwriter.Workbook("Example.xlsx")
worksheet = workbook.add_worksheet()
chart1 = workbook.add_chart({'type': 'column', 'subtype': 'stacked'})

# Add the worksheet data
headings = ['Model 1', 'Model 2', 'Capacity']
data = [
    [10, 40, 50, 20, 10, 50],
    [30, 60, 70, 50, 40, 30],
    [20, 30, 40, 40, 30, 30]
]

worksheet.write_row('A1', headings)
worksheet.write_column('A2', data[0])
worksheet.write_column('B2', data[1])
worksheet.write_column('C2', data[2])

# Configure the first series.
chart1.add_series({
    'name':       '=Sheet1!$A$1',
    'values':     '=Sheet1!$A$2:$A$7',
})

# Configure the first series.
chart1.add_series({
    'name':       '=Sheet1!$B$1',
    'values':     '=Sheet1!$B$2:$B$7',
})


# Add a chart title
chart1.set_title ({'name': 'xlsxwriter chart'})

# Create a second line chart.
chart2 = workbook.add_chart({'type': 'line'})

chart2.add_series({
    'name':      '=Sheet1!$C$1',
    'values':    '=Sheet1!$C$2:$C$7',
})


# Combine the charts.
chart1.combine(chart2)

# Insert the chart into the worksheet (with an offset).
worksheet.insert_chart('F1', chart1)

# Finally, close the Excel file
workbook.close()

输出：