تصویر:Eig sym matrix ellipse.png
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Eig_sym_matrix_ellipse.png (4KB, MIME type: image/png
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// Scilab script to generate the figure
x1=[-1:.01:1]; y1=sqrt(1-x1^2); // equation of a circle (upper part) y2=-y1; // lower part of the circle plot(x1,y1,'b'); // plot the upper half of the circle plot(x1,y2,'b'); // plot the lower half of the circle A=[3 4; 4 3]; // symmetric matrix W1=A*[x1;y1]; // transform the upper half of the circle W2=A*[x1;y2]; // transform the lower half of the circle plot(W1(1,:),W1(2,:),'r'); // plot half ellipsoid plot(W2(1,:),W2(2,:),'r'); // plot other half of the ellipsoid square(-6,-6,6,6); [V,E]=spec(A); // eigenvectors and eigenvalues s1=7; plot([0 V(1,1)].*s1,[0 V(1,2)].*s1,'k'); // plot the first eigenvector plot([0 V(2,1)].*s1,[0 V(2,2)].*s1,'k'); // plot the second eigenvector
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- (ضائع) ( رائج) 04:09, 23 جولائی 2006 . . Urdutext (تبادلۂ_خیال | شـراکـت) . . 352×340 (3,774 bytes) (<div align="left" dir="ltr"> // Scilab script to generate the figure <PRE> x1=[-1:.01:1]; y1=sqrt(1-x1^2); y2=-y1; plot(x1,y1,'b'); plot(x1,y2,'b'); A=[3 4; 4 3]; W1=A*[x1;y1]; W2=A*[x1;y2]; plot(W1(1,:),W1(2,:),'r'); plot(W2(1,:),W2(2,:),'r'); square(-6,)
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