numpy.ppt

文档介绍：numpyNumpyobjects>>>importnumpyasnp>>>([1,2,3])‏array([1,2,3])‏>>>([1,2,])‏array([1.,2.,3.])‏>>>([1,2,3],)‏array([1.,2.,3.])‏>>>([range(3)forxinrange(4)],)‏array([[0.,1.,2.],[0.,1.,2.],[0.,1.,2.],[0.,1.,2.]])‏>>>Numpyobjects>>>A=([range(3)forxinrange(4)],)‏>>>([range(3)forxinrange(4)],)‏matrix([[0.,1.,2.],[0.,1.,2.],[0.,1.,2.],[0.,1.,2.]])‏>>>M=([range(3)forxinrange(4)],)‏>>>type(A),type(M)‏(<type''>,<class''>)‏>>>(range(3),)‏matrix([[0.,1.,2.]])‏>>>(range(3),)‏array([0.,1.,2.])‏>>>M=(range(3),)‏>>>A=(range(3),)‏>>>(3,)‏>>>(1,3)‏Numpyobjects>>>M=(range(3),)‏>>>A=(range(3),)‏>>>([0.,1.,2.])‏>>>([[0.],[1.],[2.]])‏>>>A=([[1,2],[2,-2]],)‏>>>M=([[1,2],[2,-2]],)‏>>>([[1.,2.],[2.,-2.]])‏>>>([[1.,2.],[2.,-2.]])‏>>>(mostrecentcalllast):File"<stdin>",line1,in<module>AttributeError:''objecthasnoattribute'I'>>>([[,],[,-]])‏>>>Numpyobjects>>>Mmatrix([[1.,2.],[2.,-2.]])‏>>>([[,],[,-]])‏>>>(A)‏array([[,],[,-]])‏>>>>>>M2=([[1,1],[0,0]],)‏>>>A2=([[1,1],[0,0]],)‏>>>M*M2matrix([[1.,1.],[2.,2.]])‏>>>A*A2array([[1.,2.],[0.,-0.]])‏>>>A2*Aarray([[1.,2.],[0.,-0.]])‏>>>M2*Mmatrix([[3.,0.],[0.,0.]])‏Numpyobjects>>>A==Mmatrix([[True,True],[True,True]],dtype=bool)‏>>>Ai=(A)‏>>>(A,Ai)‏array([[+00,-17],[+00,+00]])‏>>>(Ai,A)‏array([[+00,--16],[+00,+00]])‏>>>M*([[+00,-17],[+00,+00]])‏>