图例颜色与面的颜色并不完全相似

Question

我正在使用leaflet函数在这个闪亮的框架中创建一个交互式地图。除了传奇之外，一切看起来都很棒。图例的颜色有些褪色，因此不能很好地表示多边形的颜色。如何解决这个问题呢？

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    renderLeaflet ({

    pal8 <- c("#FFFFE5", "#D9F0A3", "#78C679", "#006837") 
  bins=quantile(mapdata_1()$Per), na.color = "#808080",  alpha = FALSE, reverse = F)
   pal <- colorFactor(palette = pal8, domain =NULL, levels=(mapdata_1()$cat), ordered = TRUE, na.color = "#808080",  alpha = FALSE, reverse = F)

     leaflet (mapdata_()) %>% 

                      addProviderTiles("CartoDB.Positron") %>% 
                     clearControls() %>%
                     clearShapes()%>%
                        addPolygons(fillColor = ~pal(cat)) %>% 



                                   addTiles() %>%

      setView(-82.706838, 40.358615, zoom=7) %>%

                        addLegend(position = "bottomright",
                         values = ~cat,

                         pal = pal,
                         title = (paste("%",input$Age_Group_map, input$sex_map, "in", input$Year_map)) ,
                       labFormat = labelFormat(
                      ))

        })

Answer 1

默认情况下，图例是透明的，这会影响颜色的外观。更改opacity参数以修复此问题：

addLegend(position = "bottomright",
          values = ~cat, 
          pal = pal,
          opacity = 1.0,
          title = (paste("%",input$Age_Group_map, 
                         input$sex_map, "in", input$Year_map)) ,
          labFormat = labelFormat())