Printing and summarizing sparse matrices

Description

Printing (non-zero elements) of sparse matrices and summarizing the sparsity structure thereof.

Usage

  ## S4 method for signature 'spam'
print(x, ...)
## S4 method for signature 'spam'
summary(object, ...)

Arguments

Details

getOption('spam.printsize') determines if the sparse matrix is coerced into a matrix and the printed as an array or if only the non-zero elements of the matrix are given.

Value

NULL for print, because the information is printed with cat there is no real need to pass any object back.
A list containing the non-zero elements and the density for summary for class spam.
A list containing the non-zero elements of the factor, the density and the fill-in for summary for class spam.chol.NgPeyton.

Author(s)

Reinhard Furrer

See Also

display or image for a graphical visualization; spam.options

Examples

set.seed(13)
smat <- spam_random(8)
par(mfcol=c(1,2),pty='s')
options(spam.printsize=1000)
print(smat)
options(spam.printsize=10)
print(smat)
summary(smat)
summary(smat)$nnz