Plot Eigen Vectors
31 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
>> covX=[3.1163 1.2956; 1.2956 0.5810];
>> [Evec Eval]=eig(covX);
for this how to plot Eigen vectors ?
0 Kommentare
Antworten (2)
Bjorn Gustavsson
am 6 Feb. 2012
Look on the file exchange for arrow plotting functions, there are at least 2 very good submissions. Those will be the "natural" choice for plotting eigenvectors for 2 and 3-D cases. For higher dimensions plot will do it, unless you have some direct geometrical interpretations of your covariance matrix - then you might prefer imagesc(reshape(Evec,[s1,s2])).
HTH
2 Kommentare
Bjorn Gustavsson
am 6 Feb. 2012
1, http://lmgtfy.com/?q=arrow+matlab+file+exchange the first, third, second and fourth link gets you to the better ones.
2, For example if you have a covariance matrix built from data taken at a number (n>>3) of atmospheric altitude levels of say the pressure, then the eigenvectors are best plotted with plot(evec). Each eigenvector correspons (handwavingly talking) to a 1-D basis function. If your covariance matrix are built from data taken at nZ altitudes at nL latitudes then it is better to look at the eigenvectors one by one: imagesc(reshape(Evec(i1,:),[nZ,nL] - s1 & s2 above)) - that way you'd see the shape of the 2-D variation of the eigenvectors. Here the size of the covariance matrix would be (nZ*nL)x(nZ*nL).
Siehe auch
Kategorien
Mehr zu Line Plots finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!