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..

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athif amran 2015-10-10

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https://ww2.mathworks.cn/matlabcentral/answers/247866-i-want-to-move-the-graph-line-by-looping-until-finally-it-fits-to-the-point-as-shown-in-the-coding-b

关闭： MATLAB Answer Bot 2021-8-20

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

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Star Strider 2015-10-10

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.

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Answer 1

Eng. Fredius Magige 2015-10-11

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https://ww2.mathworks.cn/matlabcentral/answers/247866-i-want-to-move-the-graph-line-by-looping-until-finally-it-fits-to-the-point-as-shown-in-the-coding-b#answer_195549

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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 .....)

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..

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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..

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