MpoMp

require 'nmatrix'

b = NMatrix.new([4, 3], [1, 2, 3, 4, 5, 6, 7, 7, 7, 8, 9, 10])
c = NMatrix.new([4, 3], stype: :yale, default: 0)
c[0,0] = 1
c[1,1] = 2
c[2,2] = 4
c[3,2] = 8

puts b

MpoMp

 #
  # call-seq:
  #   norm -> Numeric
  #
  #  Calculates the selected norm (defaults to Frobenius norm) of a 2D matrix.
  #  
  #  This should be used for small or medium sized matrices. 
  #  For greater matrices, there should be a separate implementation where
  #  the norm is estimated, not computed.
  #  

MpoMp

have_library: checking for main() in -llapack... -------------------- yes

"gcc -o conftest -I/usr/include/ruby-1.9.1/x86_64-linux -I/usr/include/ruby-1.9.1/ruby/backward -I/usr/include/ruby-1.9.1 -I. -D_FORTIFY_SOURCE=2  -D_FORTIFY_SOURCE=2 -Wall  -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -fno-strict-aliasing -fPIC conftest.c  -L. -L/usr/lib -L. -Wl,-Bsymbolic-functions -Wl,-z,relro -rdynamic -Wl,-export-dynamic     -lruby-1.9.1  -lpthread -lrt -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */