Subassign-methods(Matrix)
Subassign-methods()所属R语言包：Matrix
Methods for "[<-" - Assigning to Subsets for 'Matrix'
“矩阵”的子集分配的方法作“< - ” -
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Methods for "[<-", i.e., extraction or subsetting mostly of matrices, in package Matrix.
包"[<-"Matrix即提取或大多矩阵子集，方法。
Note: Contrary to standadrd matrix assignment in base R, in x[..] <- val it is typically an error (see stop) when the type or class of val would require the class of x to be changed, e.g., when x is logical, say "lsparseMatrix", and val is numeric.
注：相反，以standadrd matrix的转让在基地ŕ，在x[..] <- val它是一个典型的错误（见stop）时的类型或classval需要的类x要改变，例如，当x是逻辑，说"lsparseMatrix"，val是数字。
方法----------Methods----------
There are many many more than these:
有很多不止这些：
is currently a simple fallback method implementation which ensures
目前是一个简单的回退方法的实现，从而确保
x = "Matrix", i = "ANY", j = "ANY", value= "ANY" currently
X =“黑客帝国”，“任何”，J =“任何”，值为“任何”目前
x = "denseMatrix", i = "index", j = "missing", value= "numeric" ...
=“denseMatrix”，I =“索引”，J =“失踪”，值为“数字”...
x = "denseMatrix", i = "index", j = "index", value= "numeric" ...
=“denseMatrix”，I =“索引”，J =“索引”，值为“数字”......
x = "denseMatrix", i = "missing", j = "index", value= "numeric" ...
=“denseMatrix”=“失踪”，J =“索引”，值为“数字”...
参见----------See Also----------
[-methods for subsetting "Matrix" objects; the index class; Extract about the standard subset assignment (and extraction).
[-methods子集"Matrix"对象;index类;Extract有关标准的子集分配（提取）。
举例----------Examples----------
set.seed(101)
(a <- m <- Matrix(round(rnorm(7*4),2), nrow = 7))
a[] <- 2.2 # <<- replaces **every** entry[<< - 取代**每**项]
a
## as do these:[＃做这些：]
a[,] <- 3 ; a[TRUE,] <- 4
m[2, 3] <- 3.14 # simple number[简单的数字]
m[3, 3:4]<- 3:4 # simple numeric of length 2[简单的数字长度为2]
## sub matrix assignment:[＃子矩阵分配：]
m[-(4:7), 3:4] <- cbind(1,2:4) #-> upper right corner of 'm'[ - >右上角的“M”]
m[3:5, 2:3] <- 0
m[6:7, 1:2] <- Diagonal(2)
m
## rows or columns only:[＃行或列：]
m[1,] <- 10
m[,2] <- 1:7
m[-(1:6), ] <- 3:0 # not the first 6 rows, i.e. only the 7th[第6行，即只有第7]
as(m, "sparseMatrix")
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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。
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发表于 2012-2-16 19:29:06
