here is the code..
disp('dy/dx=1+xy');h=0.2;xfinal=0.6;y(1)=2;x(1)=0;f=@(x,y) 1+x*y;for i=1:ceil(xfinal/h) x(i+1)=x(i)+h; k1=f((x(i)),y(i)); k2=f((x(i)+.5*h),(y(i)+.5*h*k1)); k3=f((x(i)+.5*h),(y(i)+.5*h*k2)); k4=f((x(i)+h),(y(i)+k3*h)); y(i+1)=y(i)+((1/6)*(k1+(2*k2)+(2*k3)+k4)*h);endplot(x,y);xlabel('x');ylabel('y');grid on;idx1=find(x==0.2);y1=y(idx1)idx2=find(x==0.4);y2=y(idx2)idx3=find((x==0.6))y3=y(idx3)disp('dy/dx=1+xy');
it returns an empty matrix error for y3…what should i do?
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