ccd.pick(rsm)
ccd.pick()所属R语言包：rsm
Find a good central-composite design
找到一个很好的中心复合设计
译者：生物统计家园网 机器人LoveR
描述----------Description----------
This function looks at all combinations of specified design parameters for central-composite designs, calculates other quantities such as the 'alpha' values for rotatability and orthogonal blocking, imposes specified restrictions, and outputs the best combinations in a order. This serves as an aid in identifying good designs. The design itself can then be generated using ccd.
此功能着眼于中心复合设计指定的设计参数组合，计算量，如“阿尔法”值可旋转和垂直阻塞，对指定的限制，并在顺序输出的最佳组合。这是作为一种辅助手段，在确定好设计。设计本身可以产生使用ccd。
用法----------Usage----------
ccd.pick(k, n.c = 2^k, n0.c = 1:10, blks.c = 1, n0.s = 1:10, bbr.c = 1,
wbr.s = 1, bbr.s = 1, best = 10, sortby = c("agreement", "N"),
restrict)
参数----------Arguments----------
参数：k
Number of factors in the design
数量因素在设计中
参数：n.c
Number(s) of factorial points in each cube block
在每个立方体块数（S）的阶乘点
参数：n0.c
Numbers(s) of center points in each cube block
在每个立方体块编号（s）的中心点
参数：blks.c
Number(s) of cube blocks that together comprise one rep of the cube portion
号码（s）的多维数据集块，它们一起构成一个代表的立方体部
参数：n0.s
Numbers(s) of center points in each star (axis-point) block
编号（s）的中心点，在每个星（轴点）嵌段
参数：bbr.c
Number(s) of copies of each cube block
编号（s）的每个立方体块的副本
参数：wbr.s
Number(s) of replications of each star poit within a block
号（s）的每个星级八邑在一个块内的重复
参数：bbr.s
Number(s) of copies of each star block
号（s）的副本，每个星型嵌段
参数：best
How many designs to list. Use best=NULL to list them all
列出多少设计。使用best=NULL将它们全部列出
参数：sortby
String(s) containing numeric expressions that are each evaluated and used as sorting key(s). Specify sortby=NULL if no sorting is desired.
字符串（S），每个评估，并作为排序键（S）的数值表达式。指定sortby=NULL如果没有排序是需要的。
参数：restrict
Optional string(s) containing Boolean expressions that are each evaluated. Only combinations where all expressions are TRUE are retained.
可选字符串（S），其中包含布尔表达式评价。只有所有的表达式的组合TRUE被保留。
Details
详细信息----------Details----------
A grid is created with all combinations of n.c, n0.c, ..., bbr.s. Then for each row of the grid, several additional variables are computed:
创建一个网格n.c，n0.c，...，bbr.s的所有组合。然后为每个网格的行，几个额外的变量计算：
n.s The total number of axis points in each star block
n.s轴点在每颗恒星块的总数
N The total number of observations in the design
N在设计的若干意见
alpha.rot The position of axis points that make the design rotatable.
alpha.rot的设计可旋转的轴点的位置。
alpha.orth The position of axis points that make the blocks mutually orthogonal. This is achieved when design moments [ii] within each block are proprtional
alpha.orth块相互正交的轴点的位置。这是在设计时时刻[II]在每块proprtional
agreement The absolute value of the log of the ratio of alpha.rot and alpha.orth. This measures agreement between
agreement的绝对值的比例alpha.rot和alpha.orth的log。此措施协议
If restrict is provided, each expression is evaluated and only the rows where the expression is TRUE are kept. (Regardless of restrict, rows are eliminated where there are insufficient degrees of freedom to estimate all needed effects for a second-order model.) The rows are sorted according to the expressions in sortby; the default is to sort by agreement and N, which is suitable for finding designs that are both rotatable and orthogonally blocked.
如果restrict提供，每个表达式进行评估，只有行表达的是TRUE保持。 （无论restrict，行有足够的自由度，，估计所有需要的二阶模型的影响消除。）的行中的表达式sortby，默认为按照排序agreement和N，这是适合于发现设计都是可转动的和正交中断。
值----------Value----------
A data.frame containing best or fewer rows, and variables n.c, n0.c, blks.c, n.s, n0.s, bbr.c, wbr.s, bbr.s, N, alpha.rot, and alpha.orth, as described above.
Adata.frame best或更少的行，和变量n.c，n0.c，blks.c，n.s，n0.s，bbr.c，wbr.s，bbr.s，N，alpha.rot和alpha.orth，如上所述。
（作者）----------Author(s)----------
Russell V. Lenth
参考文献----------References----------
Journal of Statistical Software, 32(7), 1–17. http://www.jstatsoft.org/v32/i07/.
Response Surface Methodology (3rd ed.), Wiley.
参见----------See Also----------
ccd
ccd
实例----------Examples----------
library(rsm)
### List CCDs in 3 factors with between 10 and 14 runs per block[＃＃列出3个因素与CCDs在10和14之间运行，每块]
ccd.pick(3, n0.c=2:6, n0.s=2:8)
### Generate the design that is listed first. [＃＃生成的设计，被列在第一位。]
ccd(3, n0=c(6,4))
### Find designs in 5 factors containing 1, 2, or 4 cube blocks[＃＃查找设计中的5个因素，1，2或4个立方体块]
### of 8 or 16 runs, 1 or 2 reps of each axis point,[＃＃8或16运行时，每个轴的点1或2代表的，]
### and no more than 70 runs altogether[＃＃不超过70个运行完全]
ccd.pick(5, n.c=c(8,16), blks.c=c(1,2,4), wbr.s=1:2, restrict="N<=70")
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。
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发表于 2012-9-28 22:02:58
