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 Author Comment/Response Robert Sterling 10/05/98 11:13pm I am trying to run a Principal Components analysis using a minimal spanning tree. What I begin with is a system of linear algebra and data which I am sure works, because I have used it before; but now I am trying to recreate an old project with the data and it is not working. I get the following error after my second input, ''Inner::heads:Heads Transpose and TakeColumns at positions 3 and 2 are expected to be the same''. The error has sense to it but I still do not completely understand what is my mistake. Any help on this one? Robert In[1]:= Needs[''Graphics`Master`'']; Needs[''LinearAlgebra`MatrixManipulation`'']; m=ReadList[''data.txt'',Number,RecordLists->True]; labels=ReadList[''oecd.txt'',Word,RecordLists->True]; h[d_]:=Plus[Times[-1,Apply[Plus,m]/Length[m]],d]; x=Map[h,m]; s=(Transpose[x].x)/Length[m]; diagonal[matrix_List]:=Transpose[matrix,{1,1}]; d=DiagonalMatrix[1/Sqrt[diagonal[s]]]; r=N[Transpose[d].s.d]; eigvals=Eigenvalues[r]; eigvecs=Eigenvectors[r]; straw=x.d; pc=straw.Transpose[eigvecs]; points=TakeColumns[full,{1,3}]; In[2]:= m//TableForm raw//TableForm eigvals//TableForm TakeColumns[eigvecs,{1,3}]//TableForm TakeColumns[pc,{1,3}]//TableForm In[3]:= fd[x_,y_]:=(x-y)^2; gd[c_,d_,e_]:=(Apply[plus,List[c,d,e]])^.5; Euc[m_]:=Inner[fd,m,Transpose[m],gd]; mm=Euc[points]; ''Inner::heads:Heads Transpose and TakeColumns at positions 3 and 2 are expected to be the same.'' URL: ,

 Subject (listing for 'unclear error message') Author Date Posted unclear error message Robert Sterl... 10/05/98 11:13pm Re: unclear error message Forum Modera... 10/08/98 3:49pm
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