spam (version 0.20-3)

print: Printing and summarizing sparse matrices

Description

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

Usage

print(x, ...)
  summary(object, ...)

Arguments

x

matrix of class spam or spam.chol.method.

object

matrix of class spam or spam.chol.method.

...

any other arguments passed to print.default.

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.

Details

spam.getOption('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.

See Also

spam.options

Examples

set.seed(13)
nz <- 8
ln <- nz
smat <- spam(0,ln,ln)
smat[cbind(sample(ln,nz),sample(ln,nz))] <- 1:nz

par(mfcol=c(1,2),pty='s')
spam.options( printsize=1000)
print(smat)
spam.options( printsize=10)
print(smat)
summary(smat)
(summary(smat))