图表坐标轴
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获取图表垂直坐标轴的最大值
Aspose.Slides for Python via .NET 允许您获取垂直坐标轴的最小值和最大值。请按照以下步骤操作:
- 创建一个 Presentation 类的实例。
- 访问第一张幻灯片。
- 添加一个带有默认数据的图表。
- 获取坐标轴上的实际最大值。
- 获取坐标轴上的实际最小值。
- 获取坐标轴上的实际主要单位。
- 获取坐标轴上的实际次要单位。
- 获取坐标轴上的实际主要单位刻度。
- 获取坐标轴上的实际次要单位刻度。
以下示例代码—上述步骤的实现—向您展示如何在 Python 中获取所需值:
import aspose.slides.charts as charts
import aspose.slides as slides
with slides.Presentation() as pres:
chart = pres.slides[0].shapes.add_chart(charts.ChartType.AREA, 100, 100, 500, 350)
chart.validate_chart_layout()
maxValue = chart.axes.vertical_axis.actual_max_value
minValue = chart.axes.vertical_axis.actual_min_value
majorUnit = chart.axes.horizontal_axis.actual_major_unit
minorUnit = chart.axes.horizontal_axis.actual_minor_unit
# 保存演示文稿
pres.save("ErrorBars_out.pptx", slides.export.SaveFormat.PPTX)
在坐标轴之间交换数据
Aspose.Slides 允许您快速交换坐标轴之间的数据—垂直坐标轴(y 轴)上的数据移动到水平坐标轴(x 轴),反之亦然。
以下 Python 代码向您展示如何在图表的坐标轴之间执行数据交换任务:
import aspose.slides.charts as charts
import aspose.slides as slides
# 创建空演示文稿
with slides.Presentation() as pres:
chart = pres.slides[0].shapes.add_chart(charts.ChartType.CLUSTERED_COLUMN, 100, 100, 400, 300)
# 切换行和列
chart.chart_data.switch_row_column()
# 保存演示文稿
pres.save("SwitchChartRowColumns_out.pptx", slides.export.SaveFormat.PPTX)
禁用线图的垂直坐标轴
以下 Python 代码向您展示如何隐藏线图的垂直坐标轴:
import aspose.slides.charts as charts
import aspose.slides as slides
with slides.Presentation() as pres:
chart = pres.slides[0].shapes.add_chart(charts.ChartType.LINE, 100, 100, 400, 300)
chart.axes.vertical_axis.is_visible = False
pres.save("chart-is_visible.pptx", slides.export.SaveFormat.PPTX)
禁用线图的水平坐标轴
以下代码向您展示如何隐藏线图的水平坐标轴:
import aspose.slides.charts as charts
import aspose.slides as slides
with slides.Presentation() as pres:
chart = pres.slides[0].shapes.add_chart(charts.ChartType.LINE, 100, 100, 400, 300)
chart.axes.horizontal_axis.is_visible = False
pres.save("chart-2.pptx", slides.export.SaveFormat.PPTX)
更改类别坐标轴
使用 CategoryAxisType 属性,您可以指定所需的类别坐标轴类型(日期或文本)。以下 Python 代码演示了该操作:
import aspose.slides.charts as charts
import aspose.slides as slides
with slides.Presentation(path + "ExistingChart.pptx") as presentation:
chart = presentation.slides[0].shapes[0]
chart.axes.horizontal_axis.category_axis_type = charts.CategoryAxisType.DATE
chart.axes.horizontal_axis.is_automatic_major_unit = False
chart.axes.horizontal_axis.major_unit = 1
chart.axes.horizontal_axis.major_unit_scale = charts.TimeUnitType.MONTHS
presentation.save("ChangeChartCategoryAxis_out.pptx", slides.export.SaveFormat.PPTX)
设置类别坐标轴值的日期格式
Aspose.Slides for Python via .NET 允许您为类别坐标轴值设置日期格式。该操作在以下 Python 代码中演示:
import aspose.slides.charts as charts
import aspose.slides as slides
from datetime import date
def to_oadate(dt):
delta = dt - date(1899, 12, 30)
return delta.days + (delta.seconds + delta.microseconds / 1e6) / (24 * 3600)
with slides.Presentation() as pres:
chart = pres.slides[0].shapes.add_chart(charts.ChartType.AREA, 50, 50, 450, 300)
wb = chart.chart_data.chart_data_workbook
wb.clear(0)
chart.chart_data.categories.clear()
chart.chart_data.series.clear()
chart.chart_data.categories.add(wb.get_cell(0, "A2", to_oadate(date(2015, 1, 1))))
chart.chart_data.categories.add(wb.get_cell(0, "A3", to_oadate(date(2016, 1, 1))))
chart.chart_data.categories.add(wb.get_cell(0, "A4", to_oadate(date(2017, 1, 1))))
chart.chart_data.categories.add(wb.get_cell(0, "A5", to_oadate(date(2018, 1, 1))))
series = chart.chart_data.series.add(charts.ChartType.LINE)
series.data_points.add_data_point_for_line_series(wb.get_cell(0, "B2", 1))
series.data_points.add_data_point_for_line_series(wb.get_cell(0, "B3", 2))
series.data_points.add_data_point_for_line_series(wb.get_cell(0, "B4", 3))
series.data_points.add_data_point_for_line_series(wb.get_cell(0, "B5", 4))
chart.axes.horizontal_axis.category_axis_type = charts.CategoryAxisType.DATE
chart.axes.horizontal_axis.is_number_format_linked_to_source = False
chart.axes.horizontal_axis.number_format = "yyyy"
pres.save("test.pptx", slides.export.SaveFormat.PPTX)
设置图表坐标轴标题的旋转角度
Aspose.Slides for Python via .NET 允许您设置图表坐标轴标题的旋转角度。该 Python 代码演示该操作:
import aspose.slides.charts as charts
import aspose.slides as slides
with slides.Presentation() as pres:
chart = pres.slides[0].shapes.add_chart(charts.ChartType.CLUSTERED_COLUMN, 50, 50, 450, 300)
chart.axes.vertical_axis.has_title = True
chart.axes.vertical_axis.title.text_format.text_block_format.rotation_angle = 90
pres.save("test.pptx", slides.export.SaveFormat.PPTX)
在类别或数值坐标轴中设置位置坐标轴
Aspose.Slides for Python via .NET 允许您在类别或数值坐标轴中设置位置坐标轴。以下 Python 代码展示了如何执行该任务:
import aspose.slides.charts as charts
import aspose.slides as slides
with slides.Presentation() as pres:
chart = pres.slides[0].shapes.add_chart(charts.ChartType.CLUSTERED_COLUMN, 50, 50, 450, 300)
chart.axes.horizontal_axis.axis_between_categories = True
pres.save("AsposeScatterChart.pptx", slides.export.SaveFormat.PPTX)
启用图表数值坐标轴的显示单位标签
Aspose.Slides for Python via .NET 允许您配置图表以在其图表数值坐标轴上显示单位标签。该 Python 代码演示了该操作:
import aspose.slides.charts as charts
import aspose.slides as slides
with slides.Presentation() as pres:
chart = pres.slides[0].shapes.add_chart(charts.ChartType.CLUSTERED_COLUMN, 50, 50, 450, 300)
chart.axes.vertical_axis.display_unit = charts.DisplayUnitType.MILLIONS
pres.save("Result.pptx", slides.export.SaveFormat.PPTX)