How not to display error message from fzero

8 vues (au cours des 30 derniers jours)
Roberto Gargiulo
Roberto Gargiulo le 9 Mar 2021
I've defined the function:
function zeros = findzeros(myf,n_points,min,max)
x = ones(n_points,1);
starting_points=linspace(min,max,n_points);
% warning('off')
for i=1:n_points
try
x(i) = fzero(myf, starting_points(i));
catch
fprintf('No root found');
end
end
x = x(x>=min);
zeros = [x(diff(x)>1e-12); x(1)];
end
In the while looping if often happens that there's an error. I tried using trycatch as suggested elsewhere, but it still results in error messages such as:
Exiting fzero: aborting search for an interval containing a sign change
because no sign change is detected during search.
Function may not have a root.
And there's no messa 'No root found' printed. How can I fix this?

Réponse acceptée

Walter Roberson
Walter Roberson le 9 Mar 2021
function zeros = findzeros(myf, n_points, xmin, xmax)
x = ones(n_points,1);
starting_points = linspace(xmin, xmax, n_points);
opts = optimset('display', 'none');
for i=1:n_points
x(i) = fzero(myf, starting_points(i), opts);
end
x = x(x >= xmin);
zeros = [x(diff(x)>1e-12); x(1)];
end
  1 commentaire
Roberto Gargiulo
Roberto Gargiulo le 9 Mar 2021
Thanks a lot! Now it works perfectly (and the code has a better format)

Connectez-vous pour commenter.

Plus de réponses (0)

Catégories

En savoir plus sur Startup and Shutdown dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by