Update app.R

app.R

@@ -31,6 +31,11 @@
   # Clean up out-of-range values
   wealth_stack[wealth_stack <= 0 | wealth_stack > 1] <- NA
   
+  all_vals <- values(wealth_stack)
+  all_vals <- all_vals[!is.na(all_vals)]
+  q_breaks_legend <- quantile(all_vals, probs = seq(0, 1, 0.2), na.rm = TRUE)
+  q_breaks <- quantile(all_vals, probs = seq(0, 1, 0.1), na.rm = TRUE)
+  
   # Load improvement data (change in IWI by state/province)
   improvement_data <- read_csv("poverty_improvement_by_state.csv")
   
@@ -78,7 +83,7 @@
           max       = length(time_periods), 
           value     = 1,
           step      = 1,
-          animate   = animationOptions(interval = 1500, loop = TRUE)
+          animate   = animationOptions(interval = 3000, loop = TRUE)
         ),
         # Show the currently selected year range clearly
         strong("Currently Selected: "),
@@ -300,22 +305,46 @@
     # (reactive to user-selected palette)
     # ----------------------------------
     color_pal <- reactive({
+      # Switch the user selection to a palette name
       palette_choice <- switch(
         input$color_palette,
-        "viridis" = "viridis",
-        "plasma"  = "plasma",
-        "magma"   = "magma",
-        "inferno" = "inferno",
-        # Fallback to a Brewer palette for "Spectral"
+        "viridis"  = "viridis",
+        "plasma"   = "plasma",
+        "magma"    = "magma",
+        "inferno"  = "inferno",
         "Spectral" = "Spectral"
       )
-      colorNumeric(
-        palette = palette_choice,
-        domain  = c(0, 1),     # Domain for map: 0 to 1
-        na.color = "transparent"
+      
+      # Create a single palette across *all* data (all_vals) using quantiles:
+      colorBin(
+        palette   = palette_choice,
+        domain    = all_vals,
+        bins      = q_breaks,
+        na.color  = "transparent"
       )
     })
     
+    color_pal_legend <- reactive({
+      # Switch the user selection to a palette name
+      palette_choice <- switch(
+        input$color_palette,
+        "viridis"  = "viridis",
+        "plasma"   = "plasma",
+        "magma"    = "magma",
+        "inferno"  = "inferno",
+        "Spectral" = "Spectral"
+      )
+      
+      # Create a single palette across *all* data (all_vals) using quantiles:
+      colorBin(
+        palette   = palette_choice,
+        domain    = all_vals,
+        bins      = q_breaks_legend,
+        na.color  = "transparent"
+      )
+    })
+    
+    
     # ----------------------------------
     # Display the currently selected time period (year range)
     # ----------------------------------
@@ -335,10 +364,10 @@
         setView(lng = 20, lat = 0, zoom = 3) %>%  # Center on Africa
         addLegend(
           position = "bottomright",
-          colors = color_pal()(legend_values),
-          labels = sprintf("%.2f", legend_values),
-          title = "IWI",
-          opacity = 1
+          pal      = color_pal_legend(),
+          values   = all_vals,  # the entire distribution for the legend
+          title    = "IWI",
+          opacity  = 1
         )
     })