在空间多边形中由$Name_3字段标识的区域子集中的一种颜色(例如，只有“Magugu”和“Nkaiti”)如何显示？我玩过plot()和子集 vector ，但没有成功。 w ^
Formal class 'SpatialPolygonsDataFrame' [package "sp"] with 5 slots
..@ data :'data.frame': 2800 obs. of 14 variables:
.. ..$ PID : int [1:2800] 97867 97868 97869 97870 97871 97872 97873 97874 97875 97876 ...
.. ..$ ID_0 : int [1:2800] 225 225 225 225 225 225 225 225 225 225 ...
.. ..$ ISO : chr [1:2800] "TZA" "TZA" "TZA" "TZA" ...
.. ..$ NAME_0 : chr [1:2800] "Tanzania" "Tanzania" "Tanzania" "Tanzania" ...
.. ..$ ID_1 : int [1:2800] 12 12 12 12 12 12 12 12 12 12 ...
.. ..$ NAME_1 : chr [1:2800] "Manyara" "Manyara" "Manyara" "Manyara" ...
.. ..$ ID_2 : int [1:2800] 52 52 52 52 52 52 52 52 52 53 ...
.. ..$ NAME_2 : chr [1:2800] "Babati" "Babati" "Babati" "Babati" ...
.. ..$ ID_3 : int [1:2800] 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 ...
.. ..$ NAME_3 : chr [1:2800] "Magugu" "Mamire" "Mwada" "Nkaiti" ...
.. ..$ NL_NAME_3: chr [1:2800] "" "" "" "" ...
.. ..$ VARNAME_3: chr [1:2800] "" "" "" "" ...
.. ..$ TYPE_3 : chr [1:2800] "Division" "Division" "Division" "Division" ...
.. ..$ ENGTYPE_3: chr [1:2800] "Division" "Division" "Division" "Division" ...
..@ polygons :List of 2800
最佳答案
基本图形plot()处理颜色的方式与所有基本图形对象相同:将颜色 vector 传递给它。 vector 对您的SpatialPolygonsDataFrame的每个元素都有一个元素，并且元素内容是颜色。
有关如何在基本图形中绘制颜色的信息，请参见以下问题:
Plot with conditional colors based on values in R
对于SPDF的特定应用，此问题如下:
https://gis.stackexchange.com/questions/36877/how-do-i-change-the-polygon-fill-color-and-border-color-for-spatialpolygons-obje