lansing(spatstat)
lansing()所属R语言包：spatstat
Lansing Woods Point Pattern
蓝星伍兹点模式
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Locations and botanical classification of trees in Lansing Woods.
位置蓝星伍兹的树木和植物分类。
The data come from an investigation of a 924 ft x 924 ft (19.6 acre) plot in Lansing Woods, Clinton County, Michigan USA by D.J. Gerrard. The data give the locations of 2251 trees and their botanical classification (into hickories, maples, red oaks, white oaks, black oaks and miscellaneous trees). The original plot size (924 x 924 feet) has been rescaled to the unit square.
这些数据来自调查A 924英尺x924英尺（19.6亩），克林顿县蓝星伍兹的图，位于美国密歇根州的DJ杰拉德。的数据给出了2251棵树木和植物分类到胡桃树，枫树，红橡木，白栎，黑橡树树和杂项的位置。已重新调整原来的图大小（924 x 924英尺）的单位面积。
用法----------Usage----------
data(lansing)
格式----------Format----------
An object of class "ppp" representing the point pattern of tree locations. Entries include
类的一个对象"ppp"点模式树的位置。参赛作品包括：
Cartesian x-coordinate of tree
笛卡尔x坐标树
Cartesian y-coordinate of tree
笛卡尔y坐标树
The levels of marks are blackoak, hickory, maple, misc, redoak and whiteoak. See ppp.object for details of the format of a point pattern object.
水平的marks是blackoak，hickory，maple，misc，redoak和whiteoak。见ppp.object点模式对象的格式的详细信息。
参考文献----------References----------
Some methods of statistical analysis for spatial data. Bull. Internat. Statist. Inst. 44, 77–92.
The robust estimation of the density of a forest stand using a new conditioned distance method. Biometrika 63, 493–500.
A method for mapping the dense and sparse regions of a forest stand. Applied Statistics 28, 14–19.
A conditioned distance ratio method for analysing spatial patterns. Biometrika 63, 483–492.
The detection of random heterogeneity in plant populations. Biometrics 33, 390–394.
Statistical methods for spatial point patterns in ecology. Spatial and temporal analysis in ecology. R.M. Cormack and J.K. Ord (eds.) Fairland: International Co-operative Publishing House. pages 95–150.
Some graphical methods in the analysis of spatial point patterns. In Interpreting Multivariate Data. V. Barnett (eds.) John Wiley and Sons. Pages 55–73.
Statistical analysis of spatial point patterns. Academic Press.
Competition quotient: a new measure of the competition affecting individual forest trees. Research Bulletin 20, Agricultural Experiment Station, Michigan State University.
Spatial stochastic point processes. PhD thesis, University of Bath, UK.
How many trees in a forest? Mathematical Scientist 3, 23–33.
实例----------Examples----------
data(lansing)
plot(lansing)
plot(split(lansing))
plot(split(lansing)$maple)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
注1：为了方便大家学习，本文档为生物统计家园网机器人LoveR翻译而成，仅供个人R语言学习参考使用，生物统计家园保留版权。
注2：由于是机器人自动翻译，难免有不准确之处，使用时仔细对照中、英文内容进行反复理解，可以帮助R语言的学习。
注3：如遇到不准确之处，请在本贴的后面进行回帖，我们会逐渐进行修订。
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发表于 2012-9-30 13:40:58
