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Jun 23rd, 2018
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  1. function P = mypolyfit(X,Y,N)
  2. %notera haer att N inte anvands utan vi far ut ett polynom med basta
  3. %mojliga grad.
  4.  
  5. Y=Y';
  6. P = ones(1,length(X));
  7. A = zeros(length(X));
  8.  
  9. for I = 0:length(P)-1;
  10. P(I+1)=I;
  11.  
  12. end
  13.  
  14. for I = 1:length(X);
  15.  
  16. for J = 1:length(X);
  17.  
  18. A(I,J) = X(I)^P(J); %Skapar matrisen enligt monombas approximation.
  19.  
  20. end
  21.  
  22. end
  23.  
  24.  
  25. P = flipud(A\Y)'; %Skickar ut varden som MATLABs egna polyfit goer. polyval evaluerar dessa.
  26.  
  27. end
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