I cannot detect an error on Newton Method.

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llucia
llucia 2023-4-6
评论： llucia 2023-4-6
I am programming the Newton Method, but I doesn´t work. Someone could help me. I would really appreciate it.
I also want to plot the function but it does not work either.
I did the following:
x = a:0.01:x+10
plot (x,f(x))
And it did not work, because no graphic appeared.
I attached the code.

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VBBV
VBBV 2023-4-6
function [x,n,error] = NewtonRaphson(f,a,eps_f,eps_x,df,maxits)
%>> df
% remaining code
x = a:0.01:x+10
plot (x,f(x))
end
Pass the anonymous function df into function NewtonRaphson
  2 个评论
VBBV
VBBV 2023-4-6
编辑：VBBV 2023-4-6
Or you can plot it outside the function as below
[x,n,error] = NewtonRaphson(f,a,eps_f,eps_x,df,maxits)
x = a:0.01:x+10;
plot (x,f(x))
%--------------------------------------------------->> df as argument
function [x,n,error] = NewtonRaphson(f,a,eps_f,eps_x,df,maxits)
% code
end
llucia
llucia 2023-4-6
thanks a lot, that was what I needed! Regarding the "plot" part, should I write X instead of x when defining the x = a:0.01:x+10?

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