R 语言中的 segment() 函数用于在特定点之间绘制线段。

用法: segments(x0, y0, x1, y1)

参数:
x, y:坐标以在提供的点之间绘制线段。

返回:给定点之间的线段

范例1:绘制单个线段

# Create empty example plotplot(0, 0, col = "white", xlab = "", ylab = "")  # Draw one linesegments(x0 = - 1, y0 = - 0.5, x1 = 0.5, y1 = 0, col = "darkgreen") 

输出:

这里,x0 & y0 是线段的起点,x1 & y1 是线段的终点。

范例2:修改颜色、粗细和线型

# Create empty example plotplot(0, 0, col = "white", xlab = "", ylab = "")  # Draw one line as in Example 1segments(x0 = - 1, y0 = - 1, x1 = 0.5, y1 = 0.5,                    # Color of line         col = "darkgreen",                          # Thickness of line         lwd = 5,                                    # Line type         lty = "dotted")                     

输出:

范例3:绘制多条线段到 R Plot。

# Create empty example plotplot(0, 0, col = "white", xlab = "", ylab = "")         # Create data frame with line-valuesmultiple_segments <- data.frame(x0 = c(0.1, 0.2, - 0.7, 0.4, - 0.8),                          y0 = c(0.8, 0.3, 0.5, - 0.4, 0.3),                       x1 = c(0, 0.4, 0.5, - 0.5, - 0.7),                       y1 = c(- 0.3, 0.4, - 0.5, - 0.7, 0.8))                          # Draw multiple lines                        segments(x0 = multiple_segments$x0,                            y0 = multiple_segments$y0,         x1 = multiple_segments$x1,         y1 = multiple_segments$y1)

输出: