/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.5.0/narray/nmatrix.rb is in ruby-narray 0.6.1.2-2build1.
This file is owned by root:root, with mode 0o644.
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# (C) Copyright 2000-2003 by Masahiro TANAKA
#
#
# ------ NMatrix ------
#
class NMatrix < NArray
CLASS_DIMENSION = 2
def +(other)
case other
when NMatrix
return super(NArray.refer(other))
when NArray
unless other.instance_of?(NArray)
return other.coerce_rev( self, :+ )
end
end
raise TypeError,"Illegal operation: NMatrix + %s" % other.class
end
def -(other)
case other
when NMatrix
return super(NArray.refer(other))
when NArray
unless other.instance_of?(NArray)
return other.coerce_rev( self, :- )
end
end
raise TypeError,"Illegal operation: NMatrix - %s" % other.class
end
def *(other)
case other
when NMatrix
NMatrix.mul_add( NArray.refer(self).newdim!(0),other.newdim(2), 1 )
#NMatrix.mul_add( NArray.refer(self).newdim!(0),
# other.transpose(1,0).newdim!(2), 0 )
when NVector
NVector.mul_add( NArray.refer(self), other.newdim(1), 0 )
when NArray
if other.instance_of?(NArray)
NMatrix.mul( NArray.refer(self), other.newdim(0,0) )
else
other.coerce_rev( self, :* )
end
when Numeric
super
#NMatrix.mul( NArray.refer(self), other )
when Array
NMatrix.mul( self, NArray[*other].newdim!(0,0) )
else
raise TypeError,"Illegal operation: NMatrix * %s" % other.class
end
end
def /(other)
case other
when NMatrix
other.lu.solve(self)
when NVector
raise TypeError,"Illegal operation: NMatrix / %s" % other.class
when NArray
if other.instance_of?(NArray)
NMatrix.div( NArray.refer(self), other.newdim(0,0) )
else
other.coerce_rev( self, :/ )
end
when Numeric
NMatrix.div( NArray.refer(self), other )
when Array
NMatrix.div( self, NArray[*other].newdim!(0,0) )
else
raise TypeError,"Illegal operation: NMatrix / %s" % other.class
end
end
def **(n)
case n
when Integer
if n==0
return 1.0
elsif n<0
m = self.inverse
n = -n
else
m = self
end
(2..n).each{ m *= self }
m
else
raise TypeError,"Illegal operation: NMatrix ** %s" % n.class
end
end
def coerce_rev(other,id)
case id
when :*
if other.instance_of?(NArray)
return NMatrix.mul( other.newdim(0,0), self )
end
if other.instance_of?(NArrayScalar)
return NMatrix.mul( other.newdim(0), self )
end
when :/
if other.instance_of?(NArray)
return NMatrix.mul( other.newdim(0,0), self.inverse )
end
if other.instance_of?(NArrayScalar)
return NMatrix.mul( other.newdim(0), self.inverse )
end
end
raise TypeError,"Illegal operation: %s %s NMatrix" %
[other.class, id.id2name]
end
def inverse
self.lu.solve( NMatrix.new(self.typecode, *self.shape).fill!(0).unit )
end
def transpose(*arg)
if arg.size==0
super(1,0)
else
super
end
end
def diagonal!(val=1)
shp = self.shape
idx = NArray.int(shp[0..1].min).indgen! * (shp[0]+1)
ref = reshape(shp[0]*shp[1],true)
if val.kind_of?(Numeric)
ref[idx,true] = val
else
val = NArray.to_na(val)
raise ArgumentError, "must be 1-d array" if val.dim!=1
ref[idx,true] = val.newdim!(-1)
end
self
end
def diagonal(val)
self.dup.diagonal!(val)
end
def unit
diagonal!
end
alias identity unit
alias I unit
end # class NMatrix
#
# ------ NVector ------
#
class NVector < NArray
CLASS_DIMENSION = 1
def +(other)
case other
when NVector
return super(NArray.refer(other))
when NArray
unless other.instance_of?(NArray)
return other.coerce_rev( self, :+ )
end
end
raise TypeError,"Illegal operation: NVector + %s" % other.class
end
def -(other)
case other
when NVector
return super(NArray.refer(other))
when NArray
unless other.instance_of?(NArray)
return other.coerce_rev( self, :- )
end
end
raise TypeError,"Illegal operation: NVector - %s" % other.class
end
def *(other)
case other
when NMatrix
NVector.mul_add( NArray.refer(self).newdim!(0), other, 1 )
when NVector
NArray.mul_add( NArray.refer(self), other, 0 ) # inner product
when NArray
if other.instance_of?(NArray)
NVector.mul( NArray.refer(self), other.newdim(0) )
else
other.coerce_rev( self, :* )
end
when Numeric
NVector.mul( NArray.refer(self), other )
else
raise TypeError,"Illegal operation: NVector * %s" % other.class
end
end
def /(other)
case other
when NMatrix
other.lu.solve(self)
when NVector
raise TypeError,"Illegal operation: NVector / %s" % other.class
when NArray
if other.instance_of?(NArray)
NVector.div( NArray.refer(self), other.newdim(0) )
else
other.coerce_rev( self, :/ )
end
when Numeric
NVector.div( NArray.refer(self), other )
else
raise TypeError,"Illegal operation: NVector / %s" % other.class
end
end
def **(n)
if n==2
self*self
else
raise ArgumentError,"Only v**2 is implemented"
end
end
def coerce_rev(other,id)
case id
when :*
if other.instance_of?(NArray)
return NVector.mul( other.newdim(0), self )
end
if other.instance_of?(NArrayScalar)
return NVector.mul( other, self )
end
end
raise TypeError,"Illegal operation: %s %s NVector" %
[other.class, id.id2name]
end
end # class NVector
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