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find positive and nonzero roots of function matlab

3 vues (au cours des 30 derniers jours)
Alper Sahin
Alper Sahin le 11 Déc 2021
Commenté : Walter Roberson le 11 Déc 2021
sin(x)-0.1*x=0 find positive and nonzero roots . thank you

Réponses (1)

Walter Roberson
Walter Roberson le 11 Déc 2021
f = @(x) sin(x) - x/10;
fplot(f, [-11, 11]);
yline(0)
You can see from this that there are 7 solutions. You can read the approximate positions from the graph, and use fzero() to find the exact locations.
  3 commentaires
Torsten
Torsten le 11 Déc 2021
As Walter pointed out, you will have to choose the starting point for fzero approximately at the position where the zero is located. This position can be seen from the above graph.
Walter Roberson
Walter Roberson le 11 Déc 2021
fzero() can only find one solution at a time; you will need to use several different starting points.

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