تصویر:Quadratic eigen.png
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Quadratic_eigen.png (4KB, MIME type: image/png
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// Scilab script to generate the figure
// Quadratic form //5y^2+8xy+5x^2=9 (plot this equation) xm=sqrt(20*9/36); // limits (from the quadratic formula) x1=[-xm:.01:xm]; y1=(-8*x1+sqrt(-36*x1.^2+20*9))/10; // use quadratic formula y2=(-8*x1-sqrt(-36*x1.^2+20*9))/10; // use quadratic formula plot(x1,y1,'b'); plot(x1,y2,'b'); A=[5 4; 4 5]; // matrix of the Quadratic form [V,E]=spec(A); // eigenvectors and eigenvalues plot([0,V(1,1)].*3.5,[0 V(2,1)].*3.5); plot([0,V(1,2)].*3.5,[0 V(2,2)].*3.5); square(-3, -3, 3, 3); xstring(-2.5,2.55,'u'); xstring(2.5,2.55,'v'); xstring(-2.15,2.2,'3'); xstring(.69,.75,'1');
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- (ضائع) ( رائج) 14:49, 5 اگست 2006 . . Urdutext (تبادلۂ_خیال | شـراکـت) . . 317×317 (3,254 bytes) (<div dir="ltr" align="left"> // Scilab script to generate the figure <PRE> // Quadratic form //5y^2+8xy+5x^2=9 (plot this equation) xm=sqrt(20*9/36); // limits (from the quadratic formula) x1=[-xm:.01:xm]; y1=(-8*x1+sqrt(-36*x1.^2+20*9))/10; // use )
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