r - 通过r中图例中的符号删除线条

Question

如何删除与 r 图例中的符号相交的线？看过 ?legend 但似乎找不到答案..

plot.new()

legend("top",ncol=1,c("Mound reef (M)","Spur and Groove (SG)",
    "Rubble Fields (RF)","Coral Walls (CW)","Mounds and rubble fields (MR)",
    "Mounds, Monostand walls and Rubble (MMR)"),pch=3:8, title="Reef Types", 
    cex=1, lwd=2)

Answer 1

只需添加 lty=NULL

plot.new()
legend("top",ncol=1,c("Mound reef (M)","Spur and Groove (SG)",
                      "Rubble Fields (RF)","Coral Walls (CW)",
                      "Mounds and rubble fields (MR)",
                      "Mounds, Monostand walls and Rubble (MMR)"),
       pch=3:8, title="Reef Types",cex=1,lwd=2, lty=NULL)

编辑

lwd=2正如 Josh O'Brien 指出的那样，删除就足够了，因此，您的代码应该是：

plot.new()
legend("top",ncol=1,c("Mound reef (M)","Spur and Groove (SG)",
                      "Rubble Fields (RF)","Coral Walls (CW)",
                      "Mounds and rubble fields (MR)",
                      "Mounds, Monostand walls and Rubble (MMR)"),
       pch=3:8, title="Reef Types",cex=1)

Answer 2

您只得到这些行是因为您指定了lwd=2，它告诉legend()函数您想要“线宽 = 2”。如果您不想要线条，只需删除lwd=参数。