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 clone of the matrix, so that the contents of each do not reference identical objects. There should be no good reason to do this since Matrices are immutable.
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.
Returns a copy of the vector.
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.
Parses environment variable env or its uppercase with splitting like a shell.
env defaults to the basename of the program.
Returns a printable version of mtch.
puts /.$/.match("foo").inspect #=> #<MatchData "o"> puts /(.)(.)(.)/.match("foo").inspect #=> #<MatchData "foo" 1:"f" 2:"o" 3:"o"> puts /(.)(.)?(.)/.match("fo").inspect #=> #<MatchData "fo" 1:"f" 2:nil 3:"o"> puts /(?<foo>.)(?<bar>.)(?<baz>.)/.match("hoge").inspect #=> #<MatchData "hog" foo:"h" bar:"o" baz:"g">
Returns a frozen copy of the string passed in to match.
m = /(.)(.)(\d+)(\d)/.match("THX1138.") m.string #=> "THX1138."
Increases left margin after newline with indent for line breaks added in the block.
Ends the current PStore#transaction, committing any changes to the data store immediately.
require "pstore" store = PStore.new("data_file.pstore") store.transaction do # begin transaction # load some data into the store... store[:one] = 1 store[:two] = 2 store.commit # end transaction here, committing changes store[:three] = 3 # this change is never reached end
WARNING: This method is only valid in a PStore#transaction. It will raise PStore::Error if called at any other time.
Returns an array with both a numeric and a big represented as Bignum objects.
This is achieved by converting numeric to a Bignum.
A TypeError is raised if the numeric is not a Fixnum or Bignum type.
(0x3FFFFFFFFFFFFFFF+1).coerce(42) #=> [42, 4611686018427387904]
provides a unified clone operation, for REXML::XPathParser to use across multiple Object types
Returns a string containing the representation of int radix base (between 2 and 36).
12345.to_s #=> "12345" 12345.to_s(2) #=> "11000000111001" 12345.to_s(8) #=> "30071" 12345.to_s(10) #=> "12345" 12345.to_s(16) #=> "3039" 12345.to_s(36) #=> "9ix" 78546939656932.to_s(36) #=> "rubyrules"