title: Fortran 90: DSYEV and associating eigenvalues and eigenvectors
body: <p>I am very new to programming and fortran in particular. I am using the LAPACK (Linear Algebra Package) software package for Fortran to find the eigenvalues and eigenvectors of a large symmetrical real matrix. Specifically, I calculate a scalar from each eigenvector, and I want to graph it against its associated eigenvalue. </p>
  
  <p>I am using the subroutine DSYEV of LAPACK to do this. However, DSYEV outputs the eigenvalues in ascending order, and I'm not sure how it orders the eigenvectors. Is there a way to associate each eigenvector with its eigenvalue?</p>
  
  <p>Edit: The official page for DSYEV is here: <a href="http://www.netlib.org/lapack/double/dsyev.f" rel="nofollow">http://www.netlib.org/lapack/double/dsyev.f</a>
  Here is another page about it: <a href="http://www.nag.co.uk/numeric/fl/nagd...F08/f08faf.xml" rel="nofollow">http://www.nag.co.uk/numeric/fl/nagd...F08/f08faf.xml</a></p>