kotovalexarian-likes-github/ruby--ruby
1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2022-11-09 12:17:21 -05:00
Code Releases Activity

* lib/matrix.rb: Matrix.zero can build rectangular matrices.

Browse source 
Vector#r should be called #magnitude

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32280 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
marcandre 2011-06-29 01:13:22 +00:00
parent de97e946f0
commit 54bbc098fa
3 changed files with 13 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

5
ChangeLog
View file

@ -1,3 +1,8 @@
Wed Jun 29 10:13:12 2011 Marc-Andre Lafortune <ruby-core@marc-andre.ca>
* lib/matrix.rb: Matrix.zero can build rectangular matrices.
Vector#r should be called #magnitude
Wed Jun 29 10:11:08 2011 Marc-Andre Lafortune <ruby-core@marc-andre.ca> Wed Jun 29 10:11:08 2011 Marc-Andre Lafortune <ruby-core@marc-andre.ca>
* lib/matrix.rb: Add Matrix#diagonal?, hermitian?, normal?, * lib/matrix.rb: Add Matrix#diagonal?, hermitian?, normal?,

2
NEWS
View file

@ -168,10 +168,12 @@ with all sufficient information, see the ChangeLog file.
* Matrix#unitary? * Matrix#unitary?
* Matrix#upper_triangular? * Matrix#upper_triangular?
* Matrix#zero? * Matrix#zero?
* Vector#magnitude
* extended methods: * extended methods:
* Matrix#each and #each_with_index can iterate on a subset of the elements * Matrix#each and #each_with_index can iterate on a subset of the elements
* Matrix#find_index returns [row, column] and can iterate on a subset * Matrix#find_index returns [row, column] and can iterate on a subset
of the elements of the elements
* Matrix.zero can build rectangular matrices
* net/http * net/http
* SNI (Server Name Indication) supported for HTTPS. * SNI (Server Name Indication) supported for HTTPS.

10
lib/matrix.rb
View file

@ -229,13 +229,14 @@ class Matrix
end end
# #
# Creates an +n+ by +n+ zero matrix. # Creates a zero matrix.
# Matrix.zero(2) # Matrix.zero(2)
# => 0 0 # => 0 0
# 0 0 # 0 0
# #
def Matrix.zero(n) def Matrix.zero(row_size, column_size = row_size)
Matrix.scalar(n, 0) rows = Array.new(row_size){Array.new(column_size, 0)}
new rows, column_size
end end
# #
@ -1723,9 +1724,10 @@ class Vector
# Returns the modulus (Pythagorean distance) of the vector. # Returns the modulus (Pythagorean distance) of the vector.
# Vector[5,8,2].r => 9.643650761 # Vector[5,8,2].r => 9.643650761
# #
def r def magnitude
Math.sqrt(@elements.inject(0) {|v, e| v + e*e}) Math.sqrt(@elements.inject(0) {|v, e| v + e*e})
end end
alias r magnitude
#-- #--
# CONVERTING # CONVERTING