isSymmetric
Test if a Matrix or other Object is Symmetric
Generic function to test if object
is symmetric or not.
Currently only a matrix method is implemented.
Usage
isSymmetric(object, ...)
"isSymmetric"(object, tol = 100 * .Machine$double.eps, ...)
Arguments
 object
 any R object; a
matrix
for the matrix method.  tol
 numeric scalar >= 0. Smaller differences are not
considered, see
all.equal.numeric
.  ...
 further arguments passed to methods; the matrix method
passes these to
all.equal
.
Details
The matrix
method is used inside eigen
by
default to test symmetry of matrices up to rounding error, using
all.equal
. It might not be appropriate in all
situations.
Note that a matrix is only symmetric if its rownames
and
colnames
are identical.
Value

logical indicating if
object
is symmetric or not.
See Also
eigen
which calls isSymmetric
when its
symmetric
argument is missing.
Examples
library(base)
isSymmetric(D3 < diag(3)) # > TRUE
D3[2, 1] < 1e100
D3
isSymmetric(D3) # TRUE
isSymmetric(D3, tol = 0) # FALSE for zerotolerance
Community examples
Looks like there are no examples yet.