折线与散点#

用途与概念#

line 连续连接有效点，scatter 只绘制标记。二者保留输入顺序，line 的 marker 可同时显示采样点；样式尺寸使用物理单位，与数据范围独立。

最小完整示例#

此文件包含画布及必要定义，可直接运行 laymesh validate 或 laymesh render，不依赖前文未声明的变量。

1# Minimal complete example: plot.line2page=canvas(size=(100mm,75mm),background="#ffffff")3p=plot(size=(86mm,62mm),x=axis(range=(0,4)),y=axis(range=(0,5)))4p.line(x=[0,1,2,3],y=[1,2,4,3],marker=circle)5page.add(p,offset=(7mm,6mm))

# Minimal complete example: plot.line
page=canvas(size=(100mm,75mm),background="#ffffff")
p=plot(size=(86mm,62mm),x=axis(range=(0,4)),y=axis(range=(0,5)))
p.line(x=[0,1,2,3],y=[1,2,4,3],marker=circle)
page.add(p,offset=(7mm,6mm))

1# Minimal complete example: plot.line2page=canvas(size=(100mm,75mm),background="#ffffff")3p=plot(size=(86mm,62mm),x=axis(range=(0,4)),y=axis(range=(0,5)))4p.line(x=[0,1,2,3],y=[1,2,4,3],marker=circle)5page.add(p,offset=(7mm,6mm))

# Minimal complete example: plot.line
page=canvas(size=(100mm,75mm),background="#ffffff")
p=plot(size=(86mm,62mm),x=axis(range=(0,4)),y=axis(range=(0,5)))
p.line(x=[0,1,2,3],y=[1,2,4,3],marker=circle)
page.add(p,offset=(7mm,6mm))

依赖文件

examples/manual/plot-line.lay

参数与默认行为#

裸几何长度使用画布单位，裸字号和描边宽度使用 pt。显式调用参数优先于继承和主题默认值；下面的接口参考逐项列出允许类型、可选值与默认来源。

组合用法#

同一 x/y 可用浅色线连接并用不同标记强调点。scatter 的 c 配 color_scale 显示第三变量，marker_size 和 opacity 可以是与数据长度相同的列表。

4p = plot(size=(210 mm, 58 mm), plot_area=box(offset=(18 mm, 6 mm), size=(185 mm, 39 mm)),5         x=axis(label="Time (s)", range=(-0.15, 3.15), ticks=[0, 1, 2, 3]),6         y=axis(label="Signal", range=(0, 5)), style=style)7p.line(x=[0, 1, 2, 3], y=[1, 3, 2, 4], color="#1683e8", label="Experiment")8p.scatter(x=[0, 1, 2, 3], y=[1, 3, 2, 4], color="#1683e8", marker_size=2.4 mm)9p.legend(position= top_left)10page.add(p, offset=(5 mm, 5 mm))

p = plot(size=(210 mm, 58 mm), plot_area=box(offset=(18 mm, 6 mm), size=(185 mm, 39 mm)),
         x=axis(label="Time (s)", range=(-0.15, 3.15), ticks=[0, 1, 2, 3]),
         y=axis(label="Signal", range=(0, 5)), style=style)
p.line(x=[0, 1, 2, 3], y=[1, 3, 2, 4], color="#1683e8", label="Experiment")
p.scatter(x=[0, 1, 2, 3], y=[1, 3, 2, 4], color="#1683e8", marker_size=2.4 mm)
p.legend(position= top_left)
page.add(p, offset=(5 mm, 5 mm))

1page = canvas(size=(220 mm, 68 mm), background="#ffffff")2style = plot_style(font_family="DejaVu Sans", font_size=9 pt)3# BEGIN DEMO4p = plot(size=(210 mm, 58 mm), plot_area=box(offset=(18 mm, 6 mm), size=(185 mm, 39 mm)),5         x=axis(label="Time (s)", range=(-0.15, 3.15), ticks=[0, 1, 2, 3]),6         y=axis(label="Signal", range=(0, 5)), style=style)7p.line(x=[0, 1, 2, 3], y=[1, 3, 2, 4], color="#1683e8", label="Experiment")8p.scatter(x=[0, 1, 2, 3], y=[1, 3, 2, 4], color="#1683e8", marker_size=2.4 mm)9p.legend(position= top_left)10page.add(p, offset=(5 mm, 5 mm))11# END DEMO

page = canvas(size=(220 mm, 68 mm), background="#ffffff")
style = plot_style(font_family="DejaVu Sans", font_size=9 pt)
# BEGIN DEMO
p = plot(size=(210 mm, 58 mm), plot_area=box(offset=(18 mm, 6 mm), size=(185 mm, 39 mm)),
         x=axis(label="Time (s)", range=(-0.15, 3.15), ticks=[0, 1, 2, 3]),
         y=axis(label="Signal", range=(0, 5)), style=style)
p.line(x=[0, 1, 2, 3], y=[1, 3, 2, 4], color="#1683e8", label="Experiment")
p.scatter(x=[0, 1, 2, 3], y=[1, 3, 2, 4], color="#1683e8", marker_size=2.4 mm)
p.legend(position= top_left)
page.add(p, offset=(5 mm, 5 mm))
# END DEMO