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(A <- sparseMatrix(i, j, x = x)) # 8 x 10 "dgCMatrix" summary(A) Particular, if there are no zeros in x then aĬsparseMatrix is a unique representation of the Instead of the triplet format by default is that the compressed columnįorm is easier to work with when performing matrix operations. The reason for returning a CsparseMatrix object Repr = "T" leaves the result as TsparseMatrix. "TsparseMatrix" class, unless īy default, when repr = "C", the CsparseMatrixĭerived from this triplet form is returned, where repr = "R" nowĪllows to directly get an RsparseMatrix and “duplicated”), the corresponding \(x_k\) are added, in When some pairs \((i_k,j_k)\) are repeated (aka TsparseMatrix is constructed, with numerical To create 1-based index vectors i and j from which a The values of i, j, p and index1 are used
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Rather use Diagonal() (or its alternatives, see there). You cannot set both singular and triangular to true Rep(seq_along(dp),dp) where dp <- diff(p), is used as Provides the compressed, or “pointer” representation of the row Non-decreasing integer vector whose first element is zero. Three vectors, which must have the same length, form the triplet Vectors of positive integers and x is a numeric vector. In typical usage, p is missing, i and j are The default, FALSE, corresponds to theĮxactly one of the arguments i, j and p must be I.e., duplicated pairs \((i_k, j_k)\) only the last one should be Logical indicating if in the case of repeated, Not set to FALSE unless you know what you're doing! Logical indicating if a validity check is performed do More efficient subsequently, but not always. TsparseMatrix, where the default was TRUE,Īnd now is determined from repr very often Csparse matrices are Logical indicating if the result should be a "T", or "R", specifying the sparse representation toīe used for the result, i.e., one from the super classes IfįALSE the index vectors are 0-based so counting of rows andĬolumns starts at 0 this corresponds to the internal representation. That is, counting of rows and columns starts at 1. Vectors i and/or j are 1-based, as is the convention In that case, the lower or upper triangle needs to In that case, only the lower or upper triangle needs to Logical indicating if the resulting matrix should be Specified, none, i.e., NULL ones, are used.
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Optional, non-negative, integer, dimensions vector of The resulting matrix will be a 0/1 patter n matrix, i.e.,
#R initialize motrix full#
Length one where it will be recycled to full length. Numeric (integer valued) vector of pointers, one for eachĬolumn (or row), to the initial (zero-based) index of elements in theĬolumn (or row). The corresponding \((i_k, j_k, x_k)\) triplet is used. \(x_k\) are added, in consistency with the definition of \((i_k,j_k)\), when x is not missing, the corresponding (row and column indices) of the non-zero (or non- TRUE)Įntries of the matrix. Integer vectors of the same length specifying the locations
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