Newton-Raphson algorithm stuck running after 4 or 5 iterations
Stuck in a Newton-Raphson loop? Learn why your algorithm is failing after a few iterations and find solutions. Get expert MATLAB troubleshooting tips now!
Stuck in a Newton-Raphson loop? Learn why your algorithm is failing after a few iterations and find solutions. Get expert MATLAB troubleshooting tips now!
Converting to numeric data type is much faster than using symbolic values
syms x real %I have defined f to be an explicit function of x, so that you can directly input %the value to get the output instead of using subs() f(x) = x^5-2*x^3+4*x+2; error_lim = 1e-5; %% newton raphson %as a result, d_f is also an explicit function of x d_f = diff(f)
m = 5; while true %conversion to double e = m - double(f(m)/d_f(m)); err = abs(e-m); %fprintf("error = %g\n", err) if err < error_lim break end m = e; %fprintf("x_p = %g\n", m) end %Succesful completion of while loop and result is obtained fprintf("the root newton raphson method is %g\n", e)
the root newton raphson method is -0.581803
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