Returns a string containing a human-readable representation of the ipaddr. (“#<IPAddr: family:address/mask>”)
Creates a matrix where the diagonal elements are composed of values.
Matrix.diagonal(9, 5, -3) # => 9 0 0 # 0 5 0 # 0 0 -3
Create a matrix by stacking matrices vertically
x = Matrix[[1, 2], [3, 4]] y = Matrix[[5, 6], [7, 8]] Matrix.vstack(x, y) # => Matrix[[1, 2], [3, 4], [5, 6], [7, 8]]
Create a matrix by stacking matrices horizontally
x = Matrix[[1, 2], [3, 4]] y = Matrix[[5, 6], [7, 8]] Matrix.hstack(x, y) # => Matrix[[1, 2, 5, 6], [3, 4, 7, 8]]
Create a matrix by combining matrices entrywise, using the given block
x = Matrix[[6, 6], [4, 4]] y = Matrix[[1, 2], [3, 4]] Matrix.combine(x, y) {|a, b| a - b} # => Matrix[[5, 4], [1, 0]]
Creates new matrix by combining with other_matrices entrywise, using the given block.
x = Matrix[[6, 6], [4, 4]] y = Matrix[[1, 2], [3, 4]] x.combine(y) {|a, b| a - b} # => Matrix[[5, 4], [1, 0]]
Returns column vector number j of the matrix as a Vector (starting at 0 like an array). When a block is given, the elements of that vector are iterated.
Returns a matrix that is the result of iteration of the given block over all elements of the matrix. Elements can be restricted by passing an argument:
:all (default): yields all elements
:diagonal: yields only elements on the diagonal
:off_diagonal: yields all elements except on the diagonal
:lower: yields only elements on or below the diagonal
:strict_lower: yields only elements below the diagonal
:strict_upper: yields only elements above the diagonal
:upper: yields only elements on or above the diagonal Matrix[ [1,2], [3,4] ].collect { |e| e**2 } # => 1 4 # 9 16
Invokes the given block for each element of matrix, replacing the element with the value returned by the block. Elements can be restricted by passing an argument:
:all (default): yields all elements
:diagonal: yields only elements on the diagonal
:off_diagonal: yields all elements except on the diagonal
:lower: yields only elements on or below the diagonal
:strict_lower: yields only elements below the diagonal
:strict_upper: yields only elements above the diagonal
:upper: yields only elements on or above the diagonal
Returns the (row, column) cofactor which is obtained by multiplying the first minor by (-1)**(row + column).
Matrix.diagonal(9, 5, -3, 4).cofactor(1, 1) # => -108
Returns true if this is a diagonal matrix. Raises an error if matrix is not square.
Returns true if this is an orthogonal matrix Raises an error if matrix is not square.
Returns true if this is a permutation matrix Raises an error if matrix is not square.
Returns a new matrix resulting by stacking horizontally the receiver with the given matrices
x = Matrix[[1, 2], [3, 4]] y = Matrix[[5, 6], [7, 8]] x.hstack(y) # => Matrix[[1, 2, 5, 6], [3, 4, 7, 8]]
Returns the transpose of the matrix.
Matrix[[1,2], [3,4], [5,6]] # => 1 2 # 3 4 # 5 6 Matrix[[1,2], [3,4], [5,6]].transpose # => 1 3 5 # 2 4 6
Returns a new matrix resulting by stacking vertically the receiver with the given matrices
x = Matrix[[1, 2], [3, 4]] y = Matrix[[5, 6], [7, 8]] x.vstack(y) # => Matrix[[1, 2], [3, 4], [5, 6], [7, 8]]
The coerce method provides support for Ruby type coercion. This coercion mechanism is used by Ruby to handle mixed-type numeric operations: it is intended to find a compatible common type between the two operands of the operator. See also Numeric#coerce.
Overrides Object#inspect
Collects (as in Enumerable#collect) over the elements of this vector and v in conjunction.
Like Array#collect.
The coerce method provides support for Ruby type coercion. This coercion mechanism is used by Ruby to handle mixed-type numeric operations: it is intended to find a compatible common type between the two operands of the operator. See also Numeric#coerce.
Overrides Object#inspect
Add option switch and handler. See make_switch for an explanation of parameters.
Completes shortened long style option switch and returns pair of canonical switch and switch descriptor OptionParser::Switch.
typ
Searching table.
opt
Searching key.
icase
Search case insensitive if true.
pat
Optional pattern for completion.