I want to move the graph line by looping until finally it fits to the point as shown in the coding below. But not the line move from 1 to 5. And finally it gives you coefficient value. Plz hlp..

function coeffs = optimalpolynomial(a,b)

xvalues =(0:a/4:a);
coeffs = zeros(1,5); 
double(b);
double(a);

c=0;
y = (b-c).*rand(1,5) + c; 
y_range = [min(y) max(y)];

plot (xvalues,y,'o',xvalues,coeffs,'r')
grid 
xlabel('x-Werte')
ylabel('y-Werte')

title(['p(x) = ',num2str(coeffs(1,1)),'+',num2str(coeffs(1,2)),'*x+',num2str(coeffs(1,3)),'*x^2+',num2str(coeffs(1,4)),'*x^3+',num2str(coeffs(1,5)),'*x^4'])
for k=1:5
    grid
    pause;

      plot (xvalues,y,'o');
      grid
      hold on;
      plot (xvalues,[k k k k k],'r')
      fprintf('new iteration!\n')    
      grid
      hold off;
      title(['p(x) = ',num2str(k),'+',num2str(k),'*x+',num2str(k),'*x^2+',num2str(k),'*x^3+',num2str(k),'*x^4'])
  end

[Star Strider]

Be careful — coeffs is a Symbolic Math Toolbox function. If you have the Symbolic Math Toolbox, rename your function ‘mycoeffs’ (or something else), to avoid confusion.

Answer 1

[Eng. Fredius Magige]

Hi You are line could be moved vertically or horizontally through the proposed and targeted equation of:

 title(['p(x) = ',num2str(k),'+',num2str(k),'*x+',num2str(k),'*x^2+',num2str(k),'*x^3+',num2str(k),'*x^4'])

polynomial equation p(x), means only affected/shifted by affecting x and NOT k as you think, might be (x-k).^ power (1,2,3 .....)