我想知道 Spatialpolygons 类的对象与 Polygons 类的对象有哪些信息。
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Polygon
如果你打开或的帮助页面SpatialPolygons
(没关系,它会引导你到同一个页面),你可以点击SpatialPolygons-class
和Polygons-class
链接。在那里,您可以看到每个类包含哪些插槽。
Polygon-class
举个例子:
Slots
ringDir:
Object of class "integer"; the ring direction of the ring (polygon) coordinates, holes are expected to be anti-clockwise
labpt:
Object of class "numeric"; an x, y coordinate pair forming the label point of the polygon
area:
Object of class "numeric"; the area of the polygon
hole:
Object of class "logical"; does the polygon seem to be a hole
coords:
Object of class "matrix"; coordinates of the polygon; first point should equal the last point
于 2010-10-06T09:27:01.393 回答