R语言:dgTMatrix-class()函数中文帮助文档(中英文对照)

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dgTMatrix-class(Matrix)
dgTMatrix-class()所属R语言包：Matrix

                                        Sparse matrices in triplet form
                                         稀疏矩阵的三元组形式

                                         译者：生物统计家园网 机器人LoveR

描述----------Description----------

The "dgTMatrix" class is the class of sparse matrices stored as (possibly redundant) triplets.  The internal representation is not at all unique, contrary to the one for class dgCMatrix.
类"dgTMatrix"类（可能是多余的）三胞胎存储稀疏矩阵。内部表示是在所有独特的，相反一类dgCMatrix。


类的对象----------Objects from the Class----------

Objects can be created by calls of the form new("dgTMatrix",     ...), but more typically via as(*, "dgTMatrix").
创建的对象可以通过电话的形式new("dgTMatrix",     ...)，但更典型，通过as(*, "dgTMatrix")。


插槽----------Slots----------




i: Object of class "integer" - the row indices of non-zero entries in 0-base, i.e., must be in
i：Object类的"integer" -  0基非零项的行指数，即必须是在




j: Object of class "integer" - the column indices of non-zero entries.  Must be the same length as slot
j：Object类的"integer" - 非零项的列索引。必须作为相同长度的插槽




x: Object of class "numeric" - the (non-zero) entry at position (i,j).  Must be the same length as slot i. If an index pair occurs more than once the corresponding
x类"numeric" - 位置(i,j)（非零）项的对象。槽i必须是相同的长度。如果一个索引对不止一次发生相应的




Dim: Object of class "integer" of length 2 -
Dim：对象类"integer"长度为2  -


方法----------Methods----------




+ signature(e1 = "dgTMatrix", e2 = "dgTMatrix")
+signature(e1 = "dgTMatrix", e2 = "dgTMatrix")




coerce signature(from = "dgTMatrix", to = "dgCMatrix")
强制signature(from = "dgTMatrix", to = "dgCMatrix")




coerce signature(from = "dgTMatrix", to = "dgeMatrix")
强制signature(from = "dgTMatrix", to = "dgeMatrix")




coerce signature(from = "dgTMatrix", to = "matrix"), and typically coercion methods for more specific signatures, we are not mentioning here.
要挟signature(from = "dgTMatrix", to = "matrix")，通常胁迫更具体的签名方法，我们不提。

Note that these are not guaranteed to continue to exist, but rather you should use calls like as(x,         "CsparseMatrix"), as(x, "generalMatrix"),
请注意，这些都不能保证继续存在，而是你应该使用像调用as(x,         "CsparseMatrix")，as(x, "generalMatrix")




coerce signature(from = "matrix", to = "dgTMatrix"),
要挟signature(from = "matrix", to = "dgTMatrix")，




crossprod signature(x = "dgTMatrix", y = "missing")
crossprodsignature(x = "dgTMatrix", y = "missing")




crossprod signature(x = "dgTMatrix", y = "matrix"): ...
crossprodsignature(x = "dgTMatrix", y = "matrix")...




crossprod signature(x = "dgTMatrix", y = "numeric"): ...
crossprodsignature(x = "dgTMatrix", y = "numeric")...




image signature(x = "dgTMatrix"): plots an image of
图像signature(x = "dgTMatrix")：图图像




t signature(x = "dgTMatrix"): returns the transpose of
Tsignature(x = "dgTMatrix")：返回的转


注意----------Note----------

Triplet matrices are a convenient form in which to construct sparse matrices after which they can be coerced to
三重矩阵是一种方便的形式，在其中构造稀疏矩阵之后，他们可以强迫


参见----------See Also----------

Class dgCMatrix or the superclasses dsparseMatrix and TsparseMatrix;
类dgCMatrix或父dsparseMatrix和TsparseMatrix;


举例----------Examples----------


m <- Matrix(0+1:28, nrow = 4)
m[-3,c(2,4:5,7)] <- m[ 3, 1:4] <- m[1:3, 6] <- 0
(mT <- as(m, "dgTMatrix"))
str(mT)
mT[1,]
mT[4, drop = FALSE]
stopifnot(identical(mT[lower.tri(mT)],
                    m [lower.tri(m) ]))
mT[lower.tri(mT,diag=TRUE)] <- 0
mT

转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。


注：
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