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📜  r 中多个绘图的常见图例 - TypeScript (1)

📅  最后修改于: 2023-12-03 14:46:52.134000             🧑  作者: Mango

r 中多个绘图的常见图例 - TypeScript 主题

本文介绍了可以在 R 中使用的一些常见图例类型和相关的 TypeScript 代码示例,帮助程序员更好地理解和使用这些图例。

目录

  1. 点图例(Legend of Points)
  2. 颜色填充图例(Legend of Color Fill)
  3. 线型图例(Legend of Line Types)
  4. 图形图例(Legend of Symbols)
  5. 图例标题与位置设置(Legend Title and Position)
  6. 更多图例设置

1. 点图例(Legend of Points)

点图例通常用于标识散点图中不同类型的数据点。

# 创建一个散点图
plot(mpg ~ wt, data = mtcars, pch = c(16, 17, 18, 19), col = c("blue", "red", "green", "purple"))

# 添加点图例
legend("topright", legend = c("A", "B", "C", "D"), pch = c(16, 17, 18, 19), col = c("blue", "red", "green", "purple"), title = "Legend Title")

2. 颜色填充图例(Legend of Color Fill)

颜色填充图例通常用于标识不同类别或组之间的颜色区分。

# 创建一个颜色填充的散点图
plot(mpg ~ wt, data = mtcars, pch = 19, col = factor(mtcars$gear))

# 添加颜色填充图例
legend("topright", legend = c("3 gears", "4 gears", "5 gears"), pch = 19, col = c("red", "blue", "green"), title = "Legend Title")

3. 线型图例(Legend of Line Types)

线型图例通常用于标识不同线条类型或线型与颜色的组合。

# 创建一个线型图
plot(1:10, type = "n") # 创建一个空白图
lines(1:10, col = "blue", lty = 1)
lines(2:11, col = "red", lty = 2)
lines(3:12, col = "green", lty = 3)

# 添加线型图例
legend("topleft", legend = c("Type 1", "Type 2", "Type 3"), col = c("blue", "red", "green"), lty = c(1, 2, 3), title = "Legend Title")

4. 图形图例(Legend of Symbols)

图形图例通常用于标识不同类型的图形。

# 创建一个图形图例
plot(1:10, type = "n") # 创建一个空白图
points(1:10, pch = 16, col = "blue")
points(2:11, pch = 17, col = "red")
points(3:12, pch = 18, col = "green")

# 添加图形图例
legend("bottomleft", legend = c("Type 1", "Type 2", "Type 3"), pch = c(16, 17, 18), col = c("blue", "red", "green"), title = "Legend Title")

5. 图例标题与位置设置(Legend Title and Position)

可以设置图例的标题和位置。

# 创建一个散点图
plot(mpg ~ wt, data = mtcars, pch = 19, col = "blue")

# 添加点图例,设置标题和位置
legend("bottomleft", legend = "Legend Title", pch = 19, col = "blue", title = "Legend Title")

6. 更多图例设置

除了上述常见的图例类型和设置,R 还提供了更多的图例设置选项,包括设置文字大小、背景色、边框等。

# 创建一个示例图
plot(1:10, type = "n") # 创建一个空白图
points(1:10, pch = 19, col = "blue")

# 添加图例,设置更多选项
legend("topleft", legend = "Legend Title", pch = 19, col = "blue", title = "Legend Title", cex = 1.2, bg = "lightgray", border = "black")

以上是一些常见的图例类型和设置的 TypeScript 示例代码,希望对你在使用 R 进行绘图时有所帮助。更多具体的图例设置选项和用法,请参阅 R 的帮助文档或在线参考资料。