betacells(spatstat)
betacells()所属R语言包:spatstat
Beta Ganglion Cells in Cat Retina
测试在猫视网膜神经节单元
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Point pattern of cells in the retina, each cell classified as "on" or "off". A bivariate point pattern.
在视网膜的单元的点图案中,每个小区分类为“上”或“关断”。一个二元模式。
用法----------Usage----------
data(betacells)
格式----------Format----------
betacells is an object of class "ppp" representing the point pattern of cell locations. Entries include
betacells是类的一个对象"ppp"点模式单元的位置。参赛作品包括:
Cartesian x-coordinate of cell
笛卡尔x-坐标单元
Cartesian y-coordinate of cell
笛卡尔y-坐标单元
factor with levels off and on
因素与水平off和on
See ppp.object for details of the format. Cartesian coordinates are given in microns.
见ppp.object的格式的详细信息。笛卡尔坐标系中给出微米。
betacells.extra is a list with one component area which is the vector of areas (in square microns) of the cells in the pattern.
betacells.extra是一个与一个组件列表area是模式中的单元的向量的领域(平方微米)。
笔记----------Notes----------
This is a new, corrected version of the old dataset ganglia. See below.
这是一个新的,旧的数据集ganglia正确版本。见下文。
These data represent a pattern of beta-type ganglion cells in the retina of a cat recorded by W\"assle et al. (1981). Beta cells are associated with the resolution of fine detail in the cat's visual system. They can be classified anatomically as “on” or “off”.
这些数据代表由W \“assle等记录猫的视网膜的图案的β型的神经节单元中。 (1981)。 β单元与精致的细节在猫的视觉系统的分辨率。它们可以分类为“on”或“off”解剖。
Statistical independence of the arrangement of the “on”- and “off”-components would strengthen the evidence for Hering's (1878) "opponent theory" that there are two separate channels for sensing “brightness” and “darkness”. See W\"assle et al (1981). There is considerable current interest in the arrangement of cell mosaics in the retina, see Rockhill et al (2000).
统计独立安排的“关于” - “关闭”组件,将加强Hering的(1878年)的“对手论”的证据有两个独立的通道,用于检测“亮度”和“黑暗” 。见W \“assle等人(1981)。有相当大的兴趣的安排,在视网膜上的单元马赛克,看,罗克希尔等(2000)。
The dataset is a multitype point pattern giving the locations and types (“on” or “off”) of beta cells observed in a rectangle of dimensions 750 x 990 microns. Coordinates are given in microns (thousandths of a millimetre).
该数据集是一个多类型的模式,让观察到的矩形尺寸750 x 990微米的β单元的位置和类型(“开启”或“关闭”)。坐标微米(千分之一毫米)。
The original source is Figure 6 of W\"assle et al (1981), which is a manual drawing of the beta mosaic observed in a microscope field-of-view of a whole mount of the retina. Thus, all beta cells in the retina were effectively projected onto the same two-dimensional plane.
的原始源是图6的W \“assle等人(1981),这是一种手动显微镜视场的一个整体的安装视图的视网膜中观察到的β马赛克图。因此,在视网膜上的所有的β单元被有效地投射到相同的两维平面。
The data were scanned in 2004 by Stephen Eglen from Figure 6(a) of W\"assle et al (1981). Image analysis software was used to identify the soma (cell body). The x,y location of each cell was taken to be the centroid of the soma. The type of each cell (“on” or 'off”) was identified by referring to Figures 6(b) and 6(d).
被扫描的数据从图6(a)的W \“assle等人(1981)在2004年由Stephen Eglen。图像分析软件被用来确定在胞体(单元体)。 x,y采取的每一个单元的胞体的质心位置。每个小区的类型(“上”或“关断”)被确定,通过参照图6(b)和图6(d)。
The area of each soma (in square microns) was also computed, and is provided in the dataset betacells.extra.
每个胞体的面积(平方微米)也被计算,并且被设置在数据集betacells.extra。
Note that this is a corrected version of the ganglia dataset provided in earlier versions of spatstat. The earlier data ganglia were not faithful to the scale in the original paper and contain some scanning errors.
请注意,这是一个修正版本的ganglia在早期版本的spatstat数据集提供。以前的数据ganglia不是忠实的规模在原纸上包含一些扫描错误。
源----------Source----------
W\"assle et al (1981), Figure 6(a), scanned and processed by Stephen Eglen S.J.Eglen@damtp.cam.ac.uk
W \“assle等人(1981),图6(a),扫描和处理由Stephen Eglen SJEglen@damtp.cam.ac.uk
参考文献----------References----------
Indices of dependence between types in multivariate point patterns. Scandinavian Journal of Statistics 26, 511–532.
Spatial order within but not between types of retinal neurons. Proc. Nat. Acad. Sci. USA 97(5), 2303–2307.
Morphology and mosaic of on- and off-beta cells in the cat retina and some functional considerations. Proc. Roy. Soc. London Ser. B 212, 177–195.
实例----------Examples----------
data(betacells)
plot(betacells)
plot(betacells$window, main="beta cells")
symbols(betacells$x, betacells$y,
circles=sqrt(betacells.extra$area/pi),
inches=FALSE, add=TRUE)
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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