python - 组合图表中的 xlsxwriter 标记

Question

我正在尝试将标记添加到我在 xlsxwriter for Python 中创建的组合图表。组合折线图和柱形图后，我想在 Val_1 = Val_2 的点上放置一个圆形标记。我不知道如何在 xlsxwriter 中执行此操作。不过，我可以在 Excel 中完成:

数据:

 Date   Val_1   Val_2   Flag
 1-Jan  100      50     #N/A
 2-Jan  150      250    #N/A
 3-Jan  125      100    #N/A
 4-Jan  110      110    110
 5-Jan  170      225    #N/A

之后 我结合了我尝试的图表和“.add_series”，但我的图表不显示任何标记。我觉得这与组合图表有关。谁能举例说明如何执行此操作？

谢谢

Answer 1

这当然可以通过添加带有标记但没有线来显示值匹配的点的第二行系列来实现。

这是一个例子:

from xlsxwriter.workbook import Workbook

workbook  = Workbook('chart_combined.xlsx')
worksheet = workbook.add_worksheet()

# Add a format for the headings.
bold = workbook.add_format({'bold': True})

# Add the worksheet data that the charts will refer to.
headings = ['Number', 'Batch 1', 'Batch 2', 'Equal']
data = [
    [2,        3,      4,        5,          6,    7      ],
    [10,       40,     50,       20,        10,    50     ],
    [30,       40,     70,       50,        10,    30     ],
    ['=NA()',  40,     '=NA()',  '=NA()',   10,    '=NA()'],
]

worksheet.write_row('A1', headings, bold)
worksheet.write_column('A2', data[0])
worksheet.write_column('B2', data[1])
worksheet.write_column('C2', data[2])
worksheet.write_column('D2', data[3])

# Create a new column chart. This will use this as the primary chart.
column_chart = workbook.add_chart({'type': 'column'})

# Configure the data series for the primary chart.
column_chart.add_series({
    'name':       '=Sheet1!$B$1',
    'categories': '=Sheet1!$A$2:$A$7',
    'values':     '=Sheet1!$B$2:$B$7',
})

# Create a new line chart. This will use this as the secondary chart.
line_chart = workbook.add_chart({'type': 'line'})

# Configure the data series for the secondary chart.
line_chart.add_series({
    'name':       '=Sheet1!$C$1',
    'categories': '=Sheet1!$A$2:$A$7',
    'values':     '=Sheet1!$C$2:$C$7',
})

# Add a series to represent the intersection points, with markers only.
line_chart.add_series({
    'name':       '=Sheet1!$D$1',
    'categories': '=Sheet1!$A$2:$A$7',
    'values':     '=Sheet1!$D$2:$D$7',
    'marker':     {'type': 'circle', 'size': 10},
    'line':       {'none': True},
})

# Delete/hide series 2 from the legend.
column_chart.set_legend({'delete_series': [2]})

# Combine the charts.
column_chart.combine(line_chart)

# Add a chart title and some axis labels. Note, this is done via the
# primary chart.
column_chart.set_title({ 'name': 'Combined chart'})
column_chart.set_x_axis({'name': 'Test number'})
column_chart.set_y_axis({'name': 'Sample length (mm)'})

# Insert the chart into the worksheet
worksheet.insert_chart('F2', column_chart)

workbook.close()

输出:

请注意，此示例隐藏了图例中的“Equal”系列名称。我不知道你是否需要它，但为了完整性我添加了它。如果不需要，请忽略它。