I'm graphing the quadratic form of a 2x2 matrix in maple TA. I've got the graph to display, but now I'm trying to add other things to it. So far I've been unable to figure out how to add a label or gridlines to the graph in Maple TA (adding gridlines in Maple is easy enough, but these don't show up in TA). Here's my code so far;

$eigvs=maple("with(LinearAlgebra):
E,V:=Eigenvectors(<<7,6>|<6,12>>);
newcoords:=V.<x,y>;
[E,V,newcoords]");

I'm trying to make the following question into a Maple TA question;
Find the orthogonal matrix R that diagonalizes the matrix A = .

Hi all,

Is there a way to call Eigenvectors(), order the returned eigenvalues from largest to smallest, and have the returned eigenvectors reflect this ordering? I've tried a sort() on the eigenvalues which orders them successfully, but I can't seem to figure out how to apply the ordering changes to my eigenvectors.

Hi all, I'm new to Maple T.A. 5.0 (I have about a weeks experience with it) and I'm wondering how to utilize the Keyword search function. When I go to Question Repository there seem to be 4 categories that I can search from; Groups, Type, Keyword, and Information Field. I understand how to use all these search options, save Keyword. Is there a way to assign a keyword to a question or a group so I can search by it? And if so, can someone please tell me how to do it?