我对R非常陌生，正在尝试确定包含~500k点的形状文件是否是随机分布的。不管我输入什么参数，我都会得到相同的错误信息。在

以下是我从一开始就有的：> library(spatstat)

spatstat 1.40-0 (nickname: ‘Do The Maths’)

For an introduction to spatstat, type ‘beginner’

> as.ppp(area)

marked planar point pattern: 500000 points

Mark variables:

[1] OBJECTID Encoded_Ti Time_ Filter Category Severity Action_ Hit_Count Profile Encoded_So Source_IP Source_Por Encoded_De

[14] Dest_IP Dest_Port VLAN_Tag Source_Cou Source_Reg Source_Cit Source_Lat Source_Lon Dest_Count Dest_Regio Dest_City Dest_Latit Dest_Longi

window: rectangle = [-159.964, 178.417] x [-46.4, 70.6349] units

Warning message:

some mark values are NA in the point pattern x

> quadrat.test(area)

Error in UseMethod("quadrat.test") :

no applicable method for 'quadrat.test' applied to an object of class "c('SpatialPointsDataFrame', 'SpatialPoints', 'Spatial')"

所以我的下一个尝试是：

^{pr2}$

我最后的尝试是：> quadrat.test(X, nx = 20, ny = 20)

Error in rectquadrat.countEngine(X$x, X$y, tess$xgrid, tess$ygrid) :

xbreaks do not span the actual range of x coordinates in data

> quadrat.test(X, nx = 20, ny = 20, xbreaks= NULL, ybreaks = NULL)

Error in rectquadrat.countEngine(X$x, X$y, tess$xgrid, tess$ygrid) :

xbreaks do not span the actual range of x coordinates in data

> data(X)

Warning message:

In data(X) : data set ‘X’ not found

> quadrat.test(X)

Error in rectquadrat.countEngine(X$x, X$y, tess$xgrid, tess$ygrid) :

xbreaks do not span the actual range of x coordinates in data

> quadrat.test(X, 10)

Error in rectquadrat.countEngine(X$x, X$y, tess$xgrid, tess$ygrid) :

xbreaks do not span the actual range of x coordinates in data

就像我说的，我在这方面很新，而且只有业余的python经验，但是我是一个研究生，需要在项目中使用这个函数。任何帮助都将不胜感激。在

干杯