Operações Algébricas

• Adicionar Matrices:

  Python Listing: ../Matrix.py. def Matrices_Add(A,B): if ( len(A)!=len(B) ): print "Matrices_Add: Matrices does not have same no of rows" exit() C=[] for i in range( len(A) ): C.append( [] ) if ( len(A[i])!=len(B[i]) ): print "Matrices_Add: Matrices does not have same no of columns" exit() for j in range( len(A[i]) ): C[i].append( 1.0*(A[i][j]+B[i][j]) ) return C

• Subtrair Matrices:

  Python Listing: ../Matrix.py. def Matrices_Sub(A,B): if ( len(A)!=len(B) ): print "Matrices_Add: Matrices does not have same no of lines" exit() C=[] for i in range( len(A) ): C.append( [] ) if ( len(A[i])!=len(B[i]) ): print "Matrices_Add: Matrices does not have same no of columns" exit() for j in range( len(A[i]) ): C[i].append( 1.0*(A[i][j]-B[i][j]) ) return C

• Multiplicar Matrices:

  Python Listing: ../Matrix.py. def Matrix_Mult_Scalar(A,a): C=[] for i in range( len(A) ): C.append( [] ) for j in range( len(A[i]) ): C[i].append( a*A[i][j] ) return C def Matrix_Mult_Vector(A,v): if ( len(A[0])!=len(v) ): print "Matrices_Mult_Vector: Matrices and Vector has incompatible dimensions" exit() w=[] for i in range( len(A) ): sum=0.0 for j in range( len(A[i]) ): sum+=1.0*A[i][j]*v[j] w.append(sum) return w def Matrices_Mult(A,B): if ( len(A[0])!=len(B) ): print "Matrices_Mult: Matrices has incompatible dimensions" exit() C=[] for i in range( len(A) ): C.append( [] ) for j in range( len(B[0]) ): sum=0.0 for k in range( len(B) ): sum+=1.0*A[i][k]*B[k][j] C[i].append(sum) return C