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尝试在地图上绘制点时出错

mapping ggplot2 r

Jaccar · 技术社区 · 9 年前

structure(list(V1 = c("St George's", "Sheffield", "Plymouth", 
"Exeter", "King's College London", "East Anglia"), 
Sample = c(183L, 139L, 106L, 128L, 152L, 178L), 
Total = c(417L, 342L, 350L, 520L, 659L, 875L), 
Response = c(43.9, 40.6, 30.3, 24.6, 23.1, 20.3), 
Lat = c(51.427194, 53.380941, 50.415735, 50.737137, 51.511486, 52.621921), 
Long = c(-0.174503, -1.487947, -4.110571, -3.535147, -0.115997, 1.239176)), 
.Names = c("V1", "Sample", "Total", "Response", "Lat", "Long"), 
row.names = c(NA, 6L), class = "data.frame")

加载数据文件后,我会执行以下操作:

UK <- map_data(map = "world", region = "UK")

ggplot(data = UK, aes(x = long, y = lat, group = group)) +
  geom_polygon() +
  geom_point(data = unidata, aes(x = Long, y = Lat, size = Response, col = "red")) +
  coord_map()

然而,这给我带来了以下错误:

eval(expr、envir、enclose)中出错:未找到对象“group”

1 回复 | 直到 9 年前

A. Stam 9 年前

当您将描述要使用的数据帧和列的参数移动到 geom_polygon()

ggplot() +
  geom_polygon(data = UK, aes(x = long, y = lat, group = group)) +
  geom_point(data = unidata, aes(x = Long, y = Lat, size = Response), col = "red") +
  coord_map()

我还移动了 col = "red" aes()