条形图中的图例未正确显示 [英] Legends in barplot not appearing properly

问题描述

heights1=c(5,5,4.5,4,4,4,4.5,2,4,4)

opar <- par(lwd = 0.3)

barplot(heights1,xlim=c(0,3), ylim=c(0,5),  width=0.1, 
main="Langauges(Verbal & Non-verbal)", 
names.arg=c("Spanish", "Speak" , "English","Speak", "Hindi", 
"Speak", "Arabic", "Speak",  "Body Lang", "Speak"), ylab="Skill level ", 
xlab="Language starting with mostly used", col=c("darkblue","red"),
cex.names=0.7,space=c(2,0,2,0,2,0,2,0,2,0))

legend("top",  c("darkblue","red"), c("reading/Writing", "Speaking")  );

蓝色代表"读/写"，红色代表"说话"。我怎样才能改正图例呢？(我不想在条形图函数中定义图例)

推荐答案

您可以将fill参数用于您的颜色。与David Robinson的回答一样，我也建议在这种情况下将图例放在右上角。

legend("topright", 
       legend = c("reading/Writing", "Speaking"), 
       fill = c("darkblue", "red"))

---

查看您的其他一些问题，您可能还希望在绘制之前花一些时间将数据转换为更合适的格式。

举个例子：

1. 这是您的数据：

   heights1 = c(5, 5, 4.5, 4, 4, 4, 4.5, 2, 4, 4) # Your data
   

2. 这是您的数据，作为matrix和相应的dimnames

   mydata <- matrix(heights1, ncol = 2, byrow = TRUE,
                    dimnames = list(c("Spanish", "English", "Hindi", 
                                      "Arabic", "Body Lang"),
                                    c("Reading/Writing", "Speaking")))
   mydata # Much more meaningful to look at than a simple vector
   #           Reading/Writing Speaking
   # Spanish               5.0        5
   # English               4.5        4
   # Hindi                 4.0        4
   # Arabic                4.5        2
   # Body Lang             4.0        4
   

3. 定义您的颜色(可选，但如果您使用的不仅仅是每组一对条，则很有用)

   colors <- c("darkblue", "red") # Define the colors you're using
   

4. 绘制您的数据，在顶部添加一些额外的空间并抑制您的轴。不确定您为什么不想在此阶段包含图例，但可以通过添加以下参数轻松完成：legend.text = TRUE, args.legend = list(x = "topright", bty = "n")

   barplot(t(mydata), beside = TRUE, col = colors, 
           ylim = c(0, 6), axes = FALSE,
           xlab = "Language starting with mostly used",
           main = "Languages (Verbal & Non-verbal)")
   

5. 重新引入y轴并添加图例

   axis(2, at = 0:5, labels = 0:5)
   legend("topright", colnames(mydata), fill = colors, bty = "n")
   

这篇关于条形图中的图例未正确显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！