R中ggplotly中图例的奇怪格式

时间:2018-03-06 14:38:53

标签: r ggplot2 plotly ggplotly

我正试图将ggplot变成情节。 ggplot渲染得很好,但是当我把它放到ggplotly时,图例突然添加了括号和标签后面的“,1”。

以下是假数据示例:

sorted1<-data.frame(CommDate=c(as.Date("2017-09-12"), as.Date("2017-10-15")), CommName=c("Foo", "Bar"), PubB4=c(2,3))

这是我试图在其上运行的代码:

ggplotly(ggplot(sorted1, aes(x=as.Date(CommDate), y=PubB4))+
           geom_smooth(level=0.0, aes(colour="Moving average"), se=FALSE)+
           geom_point(aes(fill=CommName), size=4)+
           expand_limits(y=c(0,4.5))+
           geom_line(mapping=aes(y=4),colour="orangered3",size=1)+
           geom_text(mapping=aes(y=4.2, x=min(sorted1$CommDate)+4), label="Target", size=3)+
           xlab("Committee Date")+
           guides(fill=guide_legend(title="Committee Names"), colour=guide_legend(title.theme=element_blank(),title=NULL))+
           scale_x_date(labels = date_format("%b-%y"))+
           theme_light()+
           theme(plot.title=element_text(hjust=0.5, size=12),panel.grid.major.x = (element_blank()), 
                 panel.grid.minor.x = (element_blank()), 
                 axis.title = element_text(size=8), legend.title = element_text(size=10),
                 legend.text = element_text(size=8), legend.box = 'vertical', legend.spacing.y = unit(-2,"mm"))+
           scale_colour_manual(name="",values="#0072B2"))

geom_smooth不会在这里呈现,但它与完整数据一起呈现。)

以下是我从中得到的结果:

ggplotly result with misformatted legend

为什么图例会显示为“(foo,1)”?

我尝试删除实际解决问题的geom_smooth,但我需要它 - 我怎么能保留它但修复传奇?

谢谢!

更新:好的,我开始评论一些内容,看看会发生什么。如果我从aes()删除了geom_smooth,那么这也可以解决问题,只要我保持scale_colour_manual注释即可。但我真的希望控制geom_smooth的美学,并将其包含在传奇中。所以我在取得进步,但仍然没有进展......

5 个答案:

答案 0 :(得分:4)

这是另一个优雅的解决方案。在引擎盖下,它检测是否有可用的图例名称选项,如果有,则删除“(”和“,1)”。

library(ggplot2)
library(plotly)
library(stringr)
library(dplyr)

data = data.frame(Date=as.Date(c("2017-09-12","2017-10-15")), PubB4=c(2,3), category=c("Foo", "Bar"))

myplot = ggplotly(ggplot(data, aes(x=Date, y=PubB4))+
    geom_hline(aes(yintercept=2.5, color="my line label"))+
    geom_point(aes(fill=category), size=4))

for (i in 1:length(myplot$x$data)){
    if (!is.null(myplot$x$data[[i]]$name)){
        myplot$x$data[[i]]$name =  gsub("\\(","",str_split(myplot$x$data[[i]]$name,",")[[1]][1])
    }
}

myplot

plot result

答案 1 :(得分:1)

由于我没有做过任何工作,我开始学习如何直接在plotly创建图表。为了未来可能的观众的利益,这里是如何在plotly中重新创建图表的方式(没有我将要再次进行的美化):

plot_ly(sorted, x=~CommDate) %>%
  add_markers(y=~PubB4, color=~factor(CommName), size=I(15)) %>% 
  add_lines(x=loess.smooth(sorted$CommDate,sorted$PubB4)$x,         
    y=loess.smooth(sorted$CommDate,sorted$PubB4)$y, name = "Rolling Average", 
    showlegend = TRUE, size=I(3)) %>%
  add_lines(x=c(min(sorted$CommDate),max(sorted$CommDate)),y=4, 
    color=I("red"), name="target", size=I(3)) %>%
  layout(yaxis=(list(range=c(0,max(c(4.5,sorted$PubB4))))),xaxis=list(range=c(min(sorted$CommDate)-10, max(sorted$CommDate)+5))) 

答案 2 :(得分:0)

使用以下方法覆盖图例名称:

scale_color_manual(labels = c("Foo", "Bar"))

如果您尝试删除它们,请填空"" - 看起来您可能已尝试使用name =

答案 3 :(得分:0)

这实际上是一种解决方法:

# First, repeating your code, noting the plot as p1
# --------------------------------------------------
sorted1<-data.frame(CommDate=c(as.Date("2017-09-12"), as.Date("2017-10-15")), CommName=c("Foo", "Bar"), PubB4=c(2,3))
p1 <- ggplotly(ggplot(sorted1, aes(x=as.Date(CommDate), y=PubB4))+
           geom_smooth(level=0.0, aes(colour="Moving average"), se=FALSE)+
           geom_point(aes(fill=CommName), size=4)+
           expand_limits(y=c(0,4.5))+
           geom_line(mapping=aes(y=4),colour="orangered3",size=1)+
           geom_text(mapping=aes(y=4.2, x=min(sorted1$CommDate)+4), label="Target", size=3)+
           xlab("Committee Date")+
           guides(fill=guide_legend(title="Committee Names"), colour=guide_legend(title.theme=element_blank(),title=NULL))+
           scale_x_date(labels = date_format("%b-%y"))+
           theme_light()+
           theme(plot.title=element_text(hjust=0.5, size=12),panel.grid.major.x = (element_blank()), 
                 panel.grid.minor.x = (element_blank()), 
                 axis.title = element_text(size=8), legend.title = element_text(size=10),
                 legend.text = element_text(size=8), legend.box = 'vertical', legend.spacing.y = unit(-2,"mm"))+
           scale_colour_manual(name="",values="#0072B2"))

现在我们可以继续解决方法:

# Now, the workaround:
# ------------------------------------------------------
p1Names <- unique(sorted1$CommName) # we need to know the "true" legend values
for (i in 1:length(p1$x$data)) { # this goes over all places where legend values are stored
  n1 <- p1$x$data[[i]]$name # and this is how the value is stored in plotly
  n2 <- " "
  for (j in 1:length(p1Names)) {
    if (grepl(x = n1, pattern = p1Names[j])) {n2 = p1Names[j]} # if the plotly legend name contains the original value, replace it with the original value
  }
  p1$x$data[[i]]$name <- n2 # now is the time for actual replacement
  if (n2 == " ") {p1$x$data[[i]]$showlegend = FALSE}  # sometimes plotly adds to the legend values that we don't want, this is how to get rid of them, too
}
p1   # now we can see the result :-)

答案 4 :(得分:0)

这是对我有用的方法。它涉及到深入生成的绘图对象并清理图例名称。

第一部分创建了一个函数,以检测剧情列表元素是否已指定图例,然后对其进行清理。

clean_plotly_leg <- function(.plotly_x, .extract_str) {
  # Inpects an x$data list in a plotly object, cleans up legend values where appropriate
  if ("legendgroup" %in% names(.plotly_x)) {
    # The list includes a legend group

    .plotly_x$legendgroup <- stringr::str_extract(.plotly_x$legendgroup, .extract_str)
    .plotly_x$name <- stringr::str_extract(.plotly_x$name, .extract_str)

  }
  .plotly_x


}

第二部分将其应用于您的示例,但有一个中间步骤。

sorted_plotly <-
  ggplotly(ggplot(sorted1, aes(x=as.Date(CommDate), y=PubB4))+
           geom_smooth(level=0.0, aes(colour="Moving average"), se=FALSE)+
           geom_point(aes(fill=CommName), size=4)+
           expand_limits(y=c(0,4.5))+
           geom_line(mapping=aes(y=4),colour="orangered3",size=1)+
           geom_text(mapping=aes(y=4.2, x=min(sorted1$CommDate)+4), label="Target", size=3)+
           xlab("Committee Date")+
           guides(fill=guide_legend(title="Committee Names"), colour=guide_legend(title.theme=element_blank(),title=NULL))+
           scale_x_date(labels = date_format("%b-%y"))+
           theme_light()+
           theme(plot.title=element_text(hjust=0.5, size=12),panel.grid.major.x = (element_blank()), 
                 panel.grid.minor.x = (element_blank()), 
                 axis.title = element_text(size=8), legend.title = element_text(size=10),
                 legend.text = element_text(size=8), legend.box = 'vertical', legend.spacing.y = unit(-2,"mm"))+
           scale_colour_manual(name="",values="#0072B2"))

sorted_plotly$x$data <-
  sorted_plotly$x$data %>% 
  map(clean_plotly_leg, "[^\\(][^,]*") # ie remove the opening bracket, if one exists, and extract each character up to the first comma

sorted_plotly 

我欢迎任何使此代码更高效的建议,但至少可以奏效