'octave'
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zajęcia13/octave.m
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39
zajęcia13/octave.m
Normal file
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#zad1
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A=[2,-2,1,-1;-1,4,-5,3;1,1,-1,1;-4,2,1,-2];
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b=[7;1;4;6];
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x=A\b;
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disp(x);
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#zad2
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function y = f (x);
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y=x^3-21*x+20;
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endfunction;
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[x, info] = fsolve("f", 1.2);
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disp(x);
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#zad3
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x=-2.0:0.05:2;
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y=-2.0:0.05:2;
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function y = f (x);
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y=x.^2-2*x+3;
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endfunction;
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plot(x,f(x));
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function y = f (x);
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y=cos(2*x);
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endfunction;
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plot(x,f(x));
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function y = f (x);
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y=sin(1./x);
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endfunction;
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plot(x,f(x));
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[xx,yy]=meshgrid(x,y);
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mesh(xx, yy, xx.^2+yy.^2)
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mesh(xx, yy, xx.^2-yy.^2 + 2*x.*y.^2+1)
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