R語言 segments()用法及代碼示例

R 語言中的 segment() 函數用於在特定點之間繪製線段。

用法： segments(x0, y0, x1, y1)

參數：
x, y:坐標以在提供的點之間繪製線段。

返回：給定點之間的線段

範例1：繪製單個線段


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

輸出：
line-segment

這裏，x0 & y0 是線段的起點，x1 & y1 是線段的終點。

範例2：修改顏色、粗細和線型


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

輸出：

範例3：繪製多條線段到 R Plot。


# Create empty example plot
plot(0, 0, col = "white", xlab = "", ylab = "")       
  
# Create data frame with line-values
multiple_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)

輸出：

相關用法

注：本文由純淨天空篩選整理自kaurbal1698大神的英文原創作品 Draw Line Segments between Particular Points in R Programming – segments() Function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。