f1.data$rewardQuantity<-as.numeric(f1.data$rewardQuantity) > ggplot(f1.data, aes(rewardTypeName, rewardQuantity))+ + geom_dotplot(aes(fill =rewardTypeName),binaxis='y', stackdir='center', dotsize = 0.3)+ + scale_fill_manual(values=c(brewer.pal(7,"Set2")[c(1,2,4,5,6,7)]))+ + theme_classic()+ + theme(panel.background=element_rect(fill="white",colour="black",linewidth=0.25), + axis.line=element_line(colour="black",linewidth=0.25), + axis.title=element_text(size=13,face="plain",color="black"), + axis.text = element_text(size=8,face="plain",color="black"), + legend.position="none" + ) Bin width defaults to 1/30 of the range of the data. Pick better value with `binwidth`. Warning message:

这段代码中存在一些语法错误。在 ggplot 函数中，第一行末尾多了两个加号（`++`），需要删除。同时，第二行也多了一个加号（`+`），需要删除。修改后的代码如下：

f1.data$rewardQuantity <- as.numeric(f1.data$rewardQuantity)
ggplot(f1.data, aes(rewardTypeName, rewardQuantity)) + 
  geom_dotplot(aes(fill = rewardTypeName), binaxis = 'y', stackdir = 'center', dotsize = 0.3) + 
  scale_fill_manual(values = c(brewer.pal(7, "Set2")[c(1, 2, 4, 5, 6, 7)])) + 
  theme_classic() + 
  theme(
    panel.background = element_rect(fill = "white", colour = "black", linewidth = 0.25), 
    axis.line = element_line(colour = "black", linewidth = 0.25), 
    axis.title = element_text(size = 13, face = "plain", color = "black"), 
    axis.text = element_text(size = 8, face = "plain", color = "black"), 
    legend.position = "none"
  )

此外，还有一条警告信息，提示我们选择更好的 `binwidth` 值来更好地呈现数据。这个警告信息并不影响代码的运行，但我们可以根据数据的特点，手动设置 `binwidth` 参数来优化图形的呈现效果。