arrows(graphics)
arrows()所属R语言包：graphics
Add Arrows to a Plot
添加箭头图
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Draw arrows between pairs of points.
对点之间绘制箭头。
用法----------Usage----------
arrows(x0, y0, x1 = x0, y1 = y0, length = 0.25, angle = 30,
code = 2, col = par("fg"), lty = par("lty"),
lwd = par("lwd"), ...)
参数----------Arguments----------
参数：x0, y0
coordinates of points from which to draw.
坐标点，从中可以得出。
参数：x1, y1
coordinates of points to which to draw. At least one must the supplied
坐标点，其中绘制。至少有一个必须提供的
参数：length
length of the edges of the arrow head (in inches).
长度（英寸）箭头的边缘。
参数：angle
angle from the shaft of the arrow to the edge of the arrow head.
从箭头的箭头头部的边缘轴的角度。
参数：code
integer code, determining kind of arrows to be drawn.
整数代码，确定绘制的箭头。
参数：col, lty, lwd
graphical parameters, possible vectors. NA values in col cause the arrow to be omitted.
图形参数，可能的向量。 NA值col引起的箭头被省略。
参数：...
graphical parameters such as xpd and the line characteristics lend, ljoin and lmitre: see par.
图形参数，如xpd和线路的特点lend，ljoin和lmitre：看到par。
Details
详情----------Details----------
For each i, an arrow is drawn between the point (x0[i], y0[i]) and the point (x1[i],y1[i]). The coordinate vectors will be recycled to the length of the longest.
对于每个的i，箭头点(x0[i], y0[i])点(x1[i],y1[i])之间。坐标向量将被回收到的最长的长度。
If code=1 an arrowhead is drawn at (x0[i],y0[i]) and if code=2 an arrowhead is drawn at (x1[i],y1[i]). If code=3 a head is drawn at both ends of the arrow. Unless length = 0, when no head is drawn.
如果code=1箭头绘制在(x0[i],y0[i])如果code=2箭头绘制在(x1[i],y1[i])。如果code=3头绘制箭头的两端。除非length = 0，无头时绘制。
The graphical parameters col, lty and lwd can be vectors of length greater than one and will be recycled if necessary.
图形参数col，lty和lwd可以是长度大于一向量，如有必要将回收。
The direction of a zero-length arrow is indeterminate, and hence so is the direction of the arrowheads. To allow for rounding error, arrowheads are omitted (with a warning) on any arrow of length less than 1/1000 inch.
一个零长度箭头的方向是不确定的，从而使箭头的方向。允许舍入误差，箭头被省略（警告）在任何长度小于1/1000英寸的箭头。
注意----------Note----------
The first four arguments in the comparable S function are named x1,y1,x2,y2.
媲美S函数的前四个参数被命名为x1,y1,x2,y2。
参考文献----------References----------
The New S Language. Wadsworth & Brooks/Cole.
参见----------See Also----------
segments to draw segments.
segments提请段。
举例----------Examples----------
x <- stats::runif(12); y <- stats::rnorm(12)
i <- order(x,y); x <- x[i]; y <- y[i]
plot(x,y, main="arrows(.) and segments(.)")
## draw arrows from point to point :[＃绘制箭头从点对点：]
s <- seq(length(x)-1)# one shorter than data[一个短比数据]
arrows(x[s], y[s], x[s+1], y[s+1], col= 1:3)
s <- s[-length(s)]
segments(x[s], y[s], x[s+2], y[s+2], col= 'pink')
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 2012-2-16 18:42:37
