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* lib/matrix: Add Matrix#round

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32350 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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marcandre 2011-07-01 06:10:40 +00:00
parent f4dda52025
commit 376b825127
3 changed files with 12 additions and 0 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
Fri Jul 1 15:10:22 2011 Marc-Andre Lafortune <ruby-core@marc-andre.ca>
* lib/matrix: Add Matrix#round
Fri Jul 1 11:41:12 2011 NARUSE, Yui <naruse@ruby-lang.org>
* string.c (tr_trans): free heap ptr when the str is not embeded.

1
NEWS
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@ -164,6 +164,7 @@ with all sufficient information, see the ChangeLog file.
* Matrix#normal?
* Matrix#orthogonal?
* Matrix#permutation?
* Matrix#round
* Matrix#symmetric?
* Matrix#unitary?
* Matrix#upper_triangular?

7
lib/matrix.rb
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@ -89,6 +89,7 @@ end
# * <tt> #determinant </tt>
# * <tt> #det </tt>
# * <tt> #rank </tt>
# * <tt> #round </tt>
# * <tt> #trace </tt>
# * <tt> #tr </tt>
# * <tt> #transpose </tt>
@ -1125,6 +1126,12 @@ class Matrix
rank
end
# Returns a matrix with entries rounded to the given precision
# (see Float#round)
#
def round(ndigits=0)
map{|e| e.round(ndigits)}
end
#
# Returns the trace (sum of diagonal elements) of the matrix.