Re: different eigenvectors

*To*: mathgroup at smc.vnet.net*Subject*: [mg83904] Re: different eigenvectors*From*: dh <dh at metrohm.ch>*Date*: Tue, 4 Dec 2007 04:21:42 -0500 (EST)*References*: <fj0rjv$per$1@smc.vnet.net>

Hi Vicky, imagine what an Eigenvector is and you will understand that if x is an EV, so is -x. That explains the different signs. Similar, if c is a constant, then c x is also an EV, the EV is only determined up to a constant factor. Further, the order of EV is arbitrary. Mathematica sorts the EV in order of decreasing absolute value of their eigenvalues. hope this helps, Daniel vicky Al Aisa wrote: > hello > > I am using Eigenvectors function to calculate eigenvectors in > mathematica 5.2. > while comparing the results with the eigenvectors (of same matrix) > computed in another system, i found that both the results are bit different > with some values having opposite sign and coloumns rearranged. > > thank you > viky al aisa >