MATLAB: Eig is not giving a matrix for left eigenvectors

Question

I am trying to find the left and right eigenvectors of a 16 by 16 matrix with [V,D,W]=eig( mat ); V, and W are supposed to be matrices where the column vectors are the right and left eigenvectors, and while V meets this, W is a 1 by 16 row vector, W =

     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16

I haven't included the matrix itself because of its size but I can. Some assistance would be much appreciated.

Answer 1

You are using vpa() around a series of rational and floating point values. The end result of vpa() is a symbolic matrix. You are then invoking eig on a symbolic matrix, getting the symbolic eig rather than the numeric eig.

If you want the numeric eig, then skip the vpa() call.