Change to scale_linewidth instead of scale_size to remove plotting warning

Author: mneilson-usgs

episodes/07-vector-shapefile-attributes-in-r.Rmd

@@ -345,7 +345,7 @@ ggplot() +
   geom_sf(data = lines_HARV, aes(color = TYPE, linewidth = TYPE)) +
   scale_color_manual(values = road_colors) +
   labs(color = 'Road Type') +
-  scale_size_manual(values = line_widths) +
+  scale_linewidth_manual(values = line_widths) +
   ggtitle("NEON Harvard Forest Field Site",
           subtitle = "Roads & Trails - Line width varies") +
   coord_sf()
@@ -391,7 +391,7 @@ Now we can create our plot.
 ```{r harv-path-line-types, fig.cap="Roads and trails in the area with different line thickness for each type of paths."}
 ggplot() +
   geom_sf(data = lines_HARV, aes(linewidth = TYPE)) +
-  scale_size_manual(values = line_width) +
+  scale_linewidth_manual(values = line_width) +
   ggtitle("NEON Harvard Forest Field Site",
           subtitle = "Roads & Trails - Line width varies") +
   coord_sf()