Y轴从最小值开始，x轴从0开始，并在R中使用matplot()使它们相交

# 示例数据
x <- 1:10
y <- rnorm(10)  # 随机生成10个正态分布的数值

# 绘制图形
matplot(x, y, type = "l", xlab = "X轴", ylab = "Y轴")

# 获取当前坐标轴的范围
usr <- par("usr")

# 设置新的坐标轴范围，使得Y轴从最小值开始，X轴从0开始
par(new = TRUE)
plot(usr[1], usr[3], xlim = c(0, usr[2]), ylim = c(min(y), max(y)), type = "n", xlab = "", ylab = "")

# 绘制新的坐标轴
axis(1, at = seq(0, usr[2], length.out = 5), labels = seq(0, usr[2], length.out = 5))
axis(2, at = seq(min(y), max(y), length.out = 5), labels = seq(min(y), max(y), length.out = 5))

# 重新绘制原始数据
matplot(x, y, type = "l", xlab = "X轴", ylab = "Y轴", add = TRUE)