Matrix (version 0.995-20)

dgCMatrix-class: Compressed, sparse, column-oriented numeric matrices

Description

The dgCMatrix class is a class of sparse numeric matrices in the compressed, sparse, column-oriented format. In this implementation the non-zero elements in the columns are sorted into increasing row order. dsCMatrix is the standard class for sparse numeric matrices in the Matrix package.

Objects from the Class

Objects can be created by calls of the form new("dgCMatrix", ...) or often more easily via Matrix(*, sparse = TRUE).

See Also

Classes dsCMatrix, dtCMatrix, lu

Examples

(m <- Matrix(c(0,0,2:0), 3,5))
str(m)
m[,1]
## regression test: this must give a validity-check error:
stopifnot(inherits(try(new("dgCMatrix", i = 0:1, p = 0:2,
                           x = c(2,3), Dim = 3:4)),
          "try-error"))