/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/nmatrix.rb is in ruby-narray 0.6.1.1-2build3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 | # Numerical Array Extention for Ruby
# (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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