The index method is specialized to return the index as [row, column] It also accepts an optional selector argument, see each for details.
Matrix[ [1,2], [3,4] ].index(&:even?) # => [0, 1] Matrix[ [1,1], [1,1] ].index(1, :strict_lower) # => [1, 0]
Returns true if this is an hermitian matrix. Raises an error if matrix is not square.
Returns true if this is a normal matrix. Raises an error if matrix is not square.
Returns true if this is a singular matrix.
Overrides Object#inspect
Returns true iff all of vectors are linearly independent.
Vector.independent?(Vector[1,0], Vector[0,1]) => true Vector.independent?(Vector[1,2], Vector[2,4]) => false
Returns true iff all of vectors are linearly independent.
Vector[1,0].independent?(Vector[0,1]) => true Vector[1,2].independent?(Vector[2,4]) => false
Returns the modulus (Pythagorean distance) of the vector.
Vector[5,8,2].r => 9.643650761
Like Vector#collect2, but returns a Vector instead of an Array.
Returns a new vector with the same direction but with norm 1.
v = Vector[5,8,2].normalize # => Vector[0.5184758473652127, 0.8295613557843402, 0.20739033894608505] v.norm => 1.0
Overrides Object#inspect
Returns an incremented value of default according to arg.
Puts option summary into to and returns to. Yields each line if a block is given.
to
Output destination, which must have method <<. Defaults to [].
width
Width of left side, defaults to @summary_width.
max
Maximum length allowed for left side, defaults to width - 1.
indent
Indentation, defaults to @summary_indent.
Parses environment variable env or its uppercase with splitting like a shell.
env defaults to the basename of the program.
Returns an incremented value of default according to arg.
Puts option summary into to and returns to. Yields each line if a block is given.
to
Output destination, which must have method <<. Defaults to [].
width
Width of left side, defaults to @summary_width.
max
Maximum length allowed for left side, defaults to width - 1.
indent
Indentation, defaults to @summary_indent.