GraphvizAttributes(Rgraphviz)
GraphvizAttributes()所属R语言包：Rgraphviz
Graph Attributes for Rgraphviz
Rgraphviz图属性
译者：生物统计家园网 机器人LoveR
描述----------Description----------
The following describes the allowable attributes to be used with Rgraphviz. Most of these are sent directly to Graphviz and will influence the plot layout, some of these are only cosmetic and stay in R. Users are referred to the Graphviz web documentation which contains some more detailed information on these attributes (and is our source).
以下介绍容许要使用Rgraphviz的属性。这些最直接发送到Graphviz的，会影响小区布局，其中一些是唯一的化妆品，并留在河的用户被称为Graphviz的网站文件，其中包含了一些关于这些属性的更详细的信息（是我们的源代码）。
图表属性----------Graph Attributes----------
General Graph Attributes:
一般图形的属性：
bgcolor: Color for the entire canvas. The default is
bgcolor：整个画布的颜色。默认是
center: Drawing is centered in the output canvas.
center：绘图输出画布的中心。
fontcolor: Color used for text, defaulting to
fontcolor：颜色用于文本，默认为
fontname: Font used for text. Default is Times Roman.
fontname：字体文本。默认是罗马时代。
fontpath: Directory used to search for fonts
fontpath：用来寻找字体目录
fontsize: Font size, in points, for text. This attribute accepts doubles for values with a default of 14.0
fontsize：字体大小，点，文字。这个属性接受与14.0的默认值双打
label: Label for the graph. This is a string with some extra escape sequences which can be used. The substring \N is replaced by the name of the node, and the substring \G by the name of the graph. For graph or cluster attributes, \G is replaced by the name of the graph or cluster. For edge attributes, the substring \N is replaced by the name of the edge, and the substrings \T and \H by the names of the tail and head nodes. The default value for nodes is \N with everything else
label：图形的标签。这是一些额外的转义序列可用于字符串。被替换的子串\N节点的名称，该子串\G图的名称。图形或群集属性，\G图形或群集的名称取代。对于边缘属性，子串\N边缘的名称取代，中的子\T和\H尾巴和头节点的名称。为节点的默认值是\N一切
labeljust: Subgraphs inherit cluster behavior for labeljust. If r, the labels are right-justified within the bounding rectangle. If l they are left-justified. Otherwise the labels are centered. The default value is
labeljust：子图继承集群labeljust行为的。如果r，标签右对齐的边框内。如果l他们是左对齐。否则，标签居中。默认值是
labelloc: Top/bottom placement for graph labels. A value of t places the label at the top, b places them at the bottom. By default root graph labels go on the bottom
labelloc：顶部/底部的图形标签的位置。值的t放置在顶部的标签，b放置在底部。默认情况下，根图标签底部
layers: Specifies a linearly ordered list of layer names attached to the graph. Only those components belonging to the current layer appear. This attribute accepts a layerList, which is list of strings separated by the characters defined with the layersep attribute which defines layer names and implicitly numbered 1,2,etc. The default
layers：线性有序列表指定一个连接到图的图层名称。只有那些属于当前层的组件出现。此属性接受layerList，它是由与layersep属性，它定义图层名称和隐编号定义的字符分隔的字符串列表1,2等。默认
layersep: Separator characters used to split the layers into a list of names. The default is colons, tabs or
layersep：用于分割成一个名单层的分隔符。默认情况下是冒号，制表符或
margin: Set X&Y margins of canvas in inches. Specified using the notation val,val where each val is a
margin：设置X和Y英寸帆布利润率。指定使用的符号val,val每个val是一个
orientation: If "[1L*]*", set graph orientation to landscape. Used only if rotate is not defined. Default is
orientation：如果“[1L *] *”，设置图表方向为横向。仅用于rotate如果没有定义。默认为
page: Width & height of output pages, in inches. If set and smaller then the size of the layout, a rectangular array of pages of the specified page size is overlaid on the layout, with origins aligned in the lower-left corner, thereby partitioning the layout into pages. The pages are then produced one at a time in 'pagedir' order. Specified using the notion
page：输出页面的宽度和高度，以英寸为单位。如果集和小布局的大小，被覆盖的矩形阵列指定的页大小的页面上的布局，在左下角对齐的起源，从而分割成页面布局。的网页，然后在时间在pagedir之一。指定使用的概念
pagedir: If the page attribute is set and applicable, this attribute specifies the order in which the pages are emitted. This is limited to one of the 8 row or column major orders. One of BL, BR, TR, RB, RT, LB, or LT specifying the 8 row or column major orders for traversing a rectangular array (the first character corresponding to the major order and the second to the
pagedir如果page属性设置和适用，此属性指定在其中的网页发出的订单。这是有限的8行或列的主要订单之一。 BL，BR，TR，RB，RT，LB或LT指定的行或列遍历一个矩形阵列（第一个字符相应的大订单，到第二大订单
quantum: If 'quantum' > 0.0, node label dimensions will be rounded to integral multiples of the quantum. This attribute is of type double, with a default and minimum value of
quantum：如果量子> 0.0，节点标签尺寸将被四舍五入到整数倍数的量子。此属性是double类型，默认和最低值
ranksep: In dot, this gives the desired rank separation in inches. If the value contains equally, the centers of all the ranks are spaced equally apart. In twopi, specifies the separation of concentric circles. This value is of type double, with a minimum value of 0.02. In dot, the
ranksep点，这使所需英寸排名分离。如果该值包含equally，所有队伍的中心间距同样分开。在twopi，指定的同心圆分离。这个值是double类型的，用了0.02的最低值。在点，
ratio: Sets the aspect ratio for the drawing. If numeric, defines aspect ratio. If it is 'fill' and 'size' has been set, node positions are scaled such that the final drawing fills exactly the specified size. If 'compress' and the 'size' attribute is set and the graph can not be drawn on a single page, then the drawing is compressed to fit in the given size. If 'auto', the 'page' attribute is set and the graph cannot be drawn on a single page, then 'size' is set to an “ideal” value. The
ratio：设置图纸的宽高比。如果数值，定义宽高比。如果它是填充和大小已设置，节点位置，缩放等，最后的图纸完全填满指定的大小。如果“压缩”和“大小”属性设置不能在一个页面上绘制图形，然后在绘图被压缩，以适应给定大小。如果“自动”，“页面”属性设置不能在一个页面上绘制的图，然后点击“大小”设置为“理想”的价值。 “
rotate: If 90, set drawing orientation to landscape.
rotate：如果是90，设置图纸方向景观。
samplepoints: If the input graph defines the 'vertices' attribute, and output is dot or xdot, this gives the number of points used to represent circles and ellipses. It plays the same role in neato, when adjusting the layout to avoid overlapping nodes. This attribute accepts integer values and
samplepoints：如果输入图中定义的“顶点”属性，输出点或xdot，这给代表圆形和椭圆形的点的数量。它起着同样的作用，在neato，调整布局，以避免重叠的节点。此属性接受整数值
size: Maximum width and height of drawing, in inches. Specified using the notation val,val where each val is a double. If not specified and there is a current output device, the graph is scaled to fit into that device. If size is not specified and there is no current output device, a plot region
size：最大绘图宽度和高度，以英寸为单位。使用指定的符号val,val每个val是一个双。如果没有指定，并有一个电流输出设备，图形缩放，以适应该设备。如果size不指定，没有电流输出设备，图区域
start: Parameter used to determine the initial layout of nodes. By default, nodes are randomly placed in a square whose sides have length (number of nodes). The same seed is always used for the random number generator, so the initial placement is repeatable. If 'start' converts to an integer, this is used as a seed value for the RNG. If 'start' is "regular", the nodes are placed regularly about a circle. Finally if 'start' is defined, and not one of those cases, the current time is used to pick a
start：参数，用于确定节点的初始布局。默认情况下，节点随机放置在一个正方形，其边长度（节点数目）。相同的种子总是使用随机数发生器，因此是可重复的初始位置。如果“开始”转换为整数，这是作为一个RNG的种子值。如果“开始”是“正规军”，定期节点被放置大约一个圆圈。最后，如果定义开始，而不是对这些情况之一，当前时间是用来挑
Dot Only Attributes
点的唯一属性
clusterrank: Mode used for handling clusters. If "local", a subgraph whose name begins with "cluster" is given special treatment. The subgraph is laid out separately, and then integrated as a unit into its parent graph. If the cluster has a 'label' parameter, this label is displayed w/ the cluster. Acceptable values are local, global or none -
clusterrank：用于处理集群的模式。如果“本地”，子图“集群”的名字开始被给予特殊待遇。子图奠定了分开，然后集成到它的父图单位。如果群集参数“标签”，这个标签会显示W /集群。可接受的值是local，global或none -
compound: Allow edges between clusters. This is a
compound：允许集群之间的边缘。这是一个
concentrate: Use edge concentrators. This is a
concentrate：使用边缘集中。这是一个
mclimit: Scale factor used to alter the 'MinQuit' and 'MaxIter' parameters used during crossing minimization. This is a
mclimit：用来改变的“MinQuit和MaxIter”交叉最小化过程中所使用的参数的比例因子。这是一个
nodesep: Minimum space between two adjacent nodes of the same rank, in inches. This is a double value with a default
nodesep：在同一职级英寸，两个相邻节点之间的最小空间。这是一个默认的双重价值
ordering: If out for a graph and n is a node in G, then edges n->* appear left to right in the order that they
ordering：如果out图形和n是G中的节点，然后边N-> *出现左到右的顺序，他们
rankdir: Determines if the layout is left-to-right or top-to-bottom. Acceptable values are LR and TB with
rankdir：确定是否布局是左到右或顶端到底层。可接受的值是LR和TB
remincross: If TRUE and there are multiple
remincross：如果TRUE有多个
searchsize: During network simplex, maximum number of edges with negative cut values to search when looking for one with
searchsize：在网络单纯，最大边数负切值，以搜寻之一时，
showboxes: Debugging feature for postscript output, R
showboxes：PostScript输出，研究调试功能
Neato Only Attributes
neato唯一属性
Damping: Factor damping force motions. On each iteration, a node's movement is limited to this factor of its potential motion. This is a double value with a default of
Damping：因子阻尼力的议案。在每次迭代中，一个节点的运动被限制到这个因素，其潜在的议案。这是一个默认的双重价值
defaultdist: Default distance between nodes in separate connected components. Only applicable if pack=FALSE. Defaults to 1+(avg. len)*sqrt(|V|) and
defaultdist：默认在单独的连接组件的节点之间的距离。如果pack=FALSE只适用。默认1+(avg. len)*sqrt(|V|)“
dim: Set the number of dimensions used for the layout. This is an integer value with a default and minimum value
dim：设置用于布局的尺寸。这是一个与默认和最低值的整数值
epsilon: Terminating condition. If length squared of all energy gradients are less than epsilon, the algorithm stops. This is a double value with a default of .0001 times the
epsilon：终止条件。如果长度的所有能量梯度平方比小量少，算法停止。这是一个默认的<code> 0.0001倍的双重价值
maxiter: Sets the number of iterations used. This is
maxiter：设置使用迭代的数量。这是
model: If circuit, use circuit resistance model to compute dissimilarity values, otherwise use shortest path.
model如果circuit，使用电路的电阻模型计算相异值，否则使用最短路径。
Twopi Only Attributes
twopi唯一属性
root: Name of the node to use as the center of the
root：节点的名称，作为该中心使用
Not Dot Attributes
不点属性
normalize: Normalize coordinates of final layout so that the first point is at the origin, then rotate so that the first edge is horizontal. This is a boolean value with a default
normalize：标准化的最终布局的坐标在原点，所以，第一点是，然后旋转，使第一条边是水平的。这是一个默认的布尔值
overlap: If scale, remove node overlaps by scaling. If FALSE, use Voronoi technique, otherwise leave
overlap：如果scale，删除节点重叠，按比例。如果FALSE，使用的Voronoi技术，否则离开
pack: If "true" or non-negative integer - each connected component is laid out separately and then the graphs are packed tightly. If pack has an integral value, this is used as the size (in points) of a margin around each part; otherwise a default margin of 8 is used. If 'false', the entire graph is laid out together. For twopi layouts, this just sets the
pack：如果每个连接组件的“真”或非负整数 - 奠定了分开，然后紧紧图表都挤满。如果包有一个整体的价值，这是用来作为保证金周围每一部分的大小（点），另有8的默认保证金使用。如果“假”，整个图形奠定了一起。 twopi布局，这只是设置
packmode: Indicates the granularity and method used for packing. This will automatically turn on pack. Acceptable values are node, clust and graph, specifying the granularity of packing connected components when
packmode：表示的粒度和包装使用的方法。这将自动开启pack。可接受的值是node，clust和graph，指定的包装连接组件的粒度时
sep: Fraction to increase polygons for purposes of
sep：分数提高为目的的多边形
splines: Draw edges as splines. This is a boolean
splines：作为样条曲线绘制的边缘。这是一个布尔
voro_margin: Factor to scale up drawing to allow margin for expansion in Voronoi technique. This is a double value
voro_margin因子缩放，绘图，以便扩大Voronoi图技术的保证金。这是一个双重价值
Output Based
基于输出
resolution: Number of pixels per inch on a display, used for SVG output. The default for this attribute is
resolution：显示器上使用SVG输出，每英寸像素数。此属性的默认
stylesheet: A URL or pathname specifying a XML style
stylesheet：一个URL或路径指定一个XML样式
truecolor: Output relies on a truecolor color model, used with bitmap outputs. This is a boolean value with a default
truecolor：上真彩颜色模式使用点阵图输出，输出的依赖。这是一个默认的布尔值
Misc
杂项
URL: Hyperlink incorporated into the output. For
URL：纳入输出的超链接。为
comment: A device dependent commentary. Not currently
comment：一个设备依赖评论。目前没有
nslimit: Number of iterations in network simplex
nslimit：网络单纯形迭代数
nslimit1: Same as nslimit but for ranking
nslimit1：nslimit但排名
outputorder: Specify order in which nodes and edges are
outputorder：指定顺序的节点和边
边缘属性----------Edge Attributes----------
General Edge Attributes
一般边缘属性
arrowhead: Shape of the arrowhead. Currently somewhat limited in what can be rendered in R as opposed to what is available via Graphviz in that only open and none are allowed. The open is used by default for directed
arrowhead：箭头的形状。目前只有open和none允许通过Graphviz的是什么，而不是什么可以在R呈现一定的限制。 open默认使用的指示
arrowsize: Multiplicative scale factor for arrowheads, type double. R only (?). This attribute accepts values of type
arrowsize：箭头乘规模因素，double类型。 R内（？）此属性接受的类型值
arrowtail: Style of arrow on the tail node of an edge, see arrowhead. For directed edges that with bidirectional
arrowtail：尾部边缘节点上的箭头样式，请参阅arrowhead。对于有向边，双向
color: The color of the edge. Defaults to
color：边缘的颜色。默认为
decorate: If TRUE, attach edge label to edge by a 2-segment polyline, underlining the label, then going to the closest point of the spline. Default is FALSE. Currently
decorate：如果为TRUE，重视边缘到边缘的标签由一个2段折线，强调标签，然后将样条线的最近点。默认FALSE。目前
dir: Edge type drawing, which ends should get the arrowhead. R only(?). For directed graphs, this defaults to forward and undirected graphs default to both. Other possible values are both (arrows in both
dir：边缘型绘图，结束应该得到的箭头。 R内（？）对于有向图，默认forwardboth和无向图的默认。其他可能的值是both（两个箭头
fontcolor: The color used for text. The
fontcolor：用于文本的颜色。 “
fontname: Font used for text. Defaults to Times
fontname：字体文本。时报默认
fontsize: Font size, used for text. Defaults to
fontsize：字体大小，文本使用。默认为
headclip: Head of the edge is clipped to the boundary of the head node, otherwise it goes to the center of the node. This is a boolean value with the default of TRUE.
headclip：头的边缘被截断头节点的边界，否则到中心节点。这是一个布尔值，默认TRUE。
headlabel: Label for the head of the edge. See label in Graph Attributes for a description of
headlabel：头边缘的标签。看到labelGraph Attributes的描述
headport: Where on the node to aim the edges, uses center, n, s, e, nw, nw, se, and
headport：目标边缘的节点上，使用center，n，s，e，nw，nw ，se，
label: The edge label. See label in Graph Attributes for a description of
label：边缘的标签。看到labelGraph Attributes的描述
labelangle: Angle in degrees that the label is rotated, as a double. Default is -25.0 with a minimum
labelangle：在标签是双旋转度角。默认是-25.0最低
labeldistance: Multiplicative scaling factor adjusting the distance that the label is from the node. This is a double
labeldistance：乘比例因子调整标签的距离是从节点。这是一个双
layer: Specifies the layers that this edge is present, type of layerRange. This is specified as a string in the format layerID or layerIDslayerIDslayerID..., where s is a character from the layersep attribute. The layerID attribute can be all, a decimal integer or a
layer：指定层，这种优势是目前，layerRange。这是作为一个格式字符串中的指定layerID或layerIDslayerIDslayerID...，其中s是layersep属性的字符。 layerID属性可以all，一个十进制整数或
style: Set line style for the edge. R only. Can be one of dashed, dotted, solid, invis
style：设置边缘的线条样式。 R内。可以dashed，dotted，solid，invis
tailclip: Same as headclip except for the tail
tailclip：同headclip除了尾巴
taillabel: Same as headlabel except for the tail of the edge. Defaults to the empty string. Currently
taillabel：headlabel除了尾部的边缘。默认为空字符串。目前
weight: The weight of the edge. This attribute is of type double with a default of 0.75 and a minimum value of
weight：边缘的重量。此属性是double类型的默认的0.75和一个最低值
Dot Only Attributes
点的唯一属性
constraint: If FALSE, edge is not used in ranking
constraint：如果为FALSE，边缘不使用排名
lhead: Logical head of an edge. If compound is TRUE, if lhead is defined and is the name of a cluster containing the real head, then the edge is clipped to the boundary
lhead：头边缘的逻辑。 compound如果是TRUE，如果lhead定义是一个真正的头部包含的集群的名称，然后边裁剪边界
ltail: Same as lhead but for the tail of the
ltail：lhead但尾部
minlen: Minimum edge length (rank difference between head and tail). This is an integer value with a default of
minlen：最小边长（排名头部和尾部之间的差异）。这是一个整数的默认值
samehead: Edges with the same head and samehead
samehead：边缘与同一头和samehead
sametail: Same as samehead but for the tail of
sametail：samehead但尾
Neato Only Attributes
neato唯一属性
len: Preferred edge length, in inches. This attribute
len：首选边的长度，以英寸为单位。此属性
Misc
杂项
URL: Hyperlink incorporated into the output. Not
URL：纳入输出的超链接。不
headURL: URL for the head of the edge. Not currently supported
headURL：头边缘的URL。目前不支持
headtooltip: If there's a headURL, annotation for a
headtooltip：如果是一个headURL，一个注解
tailURL: Same as headURL but for the tail of an
tailURL：headURL但对于一个尾巴
tailtooltip: Same as headtooltip but for the
tailtooltip：headtooltip但对于相同
tooltip: Same as headtooltip but for the edge
tooltip：headtooltip但边缘
showboxes: Debugging feature for postscript. Not
showboxes：后记调试功能。不
comment: Device dependent comment inserted into the
comment：插入到设备依赖评论
节点属性----------Node Attributes----------
General Node Attributes
一般节点属性
color: Basic drawing color for the node, corresponding to the outside edge of the node. The interior of the node is specified with the fillcolor attribute. Defaults to
color：为节点的基本绘图颜色，对应的节点的外边缘。节点内部指定fillcolor属性。默认为
distortion: Distortion factor for shape=polygon, positive values cause top to be larger then bottom, negative is opposite. This is a double value with a
distortion：shape=polygon的失真因素，正面的价值观造成顶端较大的底部，是否定的对面。这是一个具有双重价值
fillcolor: Background color of the node. This
fillcolor：节点的背景颜色。这
fixedsize: Use only width and height attributes, do not expand for the width of the label. This
fixedsize：使用仅width和height属性，不扩大为标签的宽度。这
fontcolor: Color used for text. This
fontcolor：用于文本的颜色。这
fontname: Font used for text. The default of this is
fontname：字体文本。此默认
fontsize: Size of font for the text. This defaults to
fontsize：文本的字体大小。此默认
height: Height of the node, in inches. This attribute accepts values as doubles with a default of 0.5 and a minimum
height：节点的高度，以英寸为单位。此属性接受的值作为默认的0.5和最低双打
label: Label for the node. See label in
label：为节点的标签。看到label
layer: Layers in which the node is present. See layer in Edge Attributes for an explanation of
layer：在该节点是目前的图层。看到layerEdge Attributes解释
peripheries: Set number of peripheries used in polygonal shapes and cluster boundaries. Note that user-defined shapes are treated as a form box shape, so the default peripheries value is 1 and the user-defined shape will be drawn in a bounding rectangle. Setting peripheries=0 will turn this off. Also, 1 is the maximum peripheries value for clusters. Not currently
peripheries：设置多边形的形状和集群边界的边缘。请注意，作为一种形式的箱形处理用户定义的形状，所以默认的边缘值是1和用户定义的形状将绘制一个边框。设置边缘= 0将关闭这个功能。此外，1个是边缘集群的最大价值。目前没有
pos: Position of the node (For neato layouts, this is the initial position of the node). Specified using the notion
pos：节点的位置（neato布局，这是该节点的初始位置）。指定使用的概念
regular: Force the polygon to be regular. Defaults to
regular：强制定期的多边形。默认为
shape: The shape of the node. Current acceptable values are circle, rectangle, rect, box and ellipse. The circle shape is the default. Note that box, rect and rectangle
shape：节点的形状。目前可接受的值是circle，rectangle，rect，box和ellipse。 circle形状是默认。请注意，box，rect和rectangle
sides: Number of sides if shape=polygon. This is an integer value with a default value of 4 and a minimum
sides：如果shape=polygon边数。这是一个用4的默认值和最低的整数值
skew: Skew factor for shape=polygon. Positive values skew the polygon to the right, negative to the left. This is a double value with a default value of 0.0 and a minimum
skew：shape=polygon斜交因素。权，负向左侧歪斜多边形正面的价值观。这是一个默认值0.0双值和最低
style: Set style for the node boundary. R only. Can be one of dashed, dotted, solid, invis
style：设置节点的边界风格。 R内。可以dashed，dotted，solid，invis
width: Width of the node, in inches. Default is
width：节点的宽度，以英寸为单位。默认为
Dot Only Attributes
点的唯一属性
group: If the end points of an edge belong to the same group, ie they have the same group attributes, parameters are set
group：如果一个边缘的终点属于同一组，即它们具有相同的组属性，参数设置
Neato Only Attributes
neato唯一属性
pin: If TRUE and node has a pos attribute on input, neato prevents the node from moving from the input
pin：如果是TRUE和节点pos输入属性，neato防止从输入节点
Misc
杂项
tooltip: Annotated tooltip if URL exists. R only.
tooltip：注释的工具提示，如果URL存在。 R内。
toplabel: Label near the top of nodes of shape M*.
toplabel：附近的节点形状M *族的顶部标签。
URL: Hyperlink incorporated into the output. Not
URL：纳入输出的超链接。不
bottomlabel: Same as toplabel but for the
bottomlabel：toplabel但对于相同
comment: Device dependent comment inserted into the
comment：插入到设备依赖评论
shapefill: If non-empty, if output is ps or svg and shape is 'espf', taken as a filename containing a device-dependent description of a node's shape. If non-empty for bitmap output (gif, jpg, etc), and shape set to 'custom', taken as the URL for a file containing the bitmap image for the node. For files on the local machine, the URL begins with "file://". For remote files, graphviz must have been configured to use a command such as curl
shapefill：如果非空，如果输出是ps或SVG和形状是espf“，包含一个节点的形状依赖于设备的描述文件名。如果非空的点阵图输出（GIF，JPG等），形状设置“自定义”，包含节点的位图图像文件的URL。对于在本地机器上的文件，以“file :/ /”的URL开始。 graphviz的远程文件，必须已配置为使用，如curl命令
z: Provides z coordinates for the node in a 3D system.
z：z坐标的三维系统中的节点。
详情----------details----------
Different attributes are appropriate for different specific graph layout algorithms. Graphviz supports three different layout algorithms, dot, neato and twopi.
不同的属性是不同的特定的图形布局算法是适当的。 graphviz的支持三种不同的布局算法，点，neato和twopi的。
There is some tension between attributes that graphviz supports and those that we can support at the R level. Please let us know if there are situations that are not being handled appropriately.
有一些属性graphviz的支持，我们可以支持R级之间的紧张关系。请让我们知道，如果有没有被妥善处理的情况。
All attributes are passed down to graphviz. However they can be later modified for rendering in R.
流传下来的所有属性与graphviz。不过，他们可以在以后修改为在R渲染
作者（S）----------Author(s)----------
Jeff Gentry
参考文献----------References----------
<h3>See Also</h3>
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 2012-2-22 20:56:37
