Please consider the following :
covMatrice = {{34.925, -10.21}, {-10.21, 22.462}};
COG = Mean@(Nfixations["d"][[1]])[[All, 1]];
fixations = {{19.4688, 17.4281}, {18.0563, 21.7156}, {13.0219, 24.7219},
{22.9594,25.5219}, {28.5406, 24.6719}, {27.0688, 17.1656},
{27.6781,16.325}, {28.9281, 10.7719}, {16.025, 13.6625},
{19.1313, 17.1094}};
With[{
eigVec = Eigenvectors[covMatrice],
eigVal = Eigenvalues[covMatrice]},
Graphics[{
White, Rectangle @@ frmXY,
Black, Disk[#, .5] & /@ fixations,
Red, Line[(# + COG) & /@
{eigVec[[1]]*eigVal[[1]]/5,
{0, 0},
eigVec[[2]]*eigVal[[2]]/5}]}]]
How could I draw an ellipse representing on the EigenSystem given that Neither Disk or Circle enable to implement an "orientation" ?
A rough example of my desired output as drawn using PPT :
Rotate
works fine if you know the angle. As the OP only has the new coordinates,GeometricTransformation
is the better choice. $\endgroup$