find positive and nonzero roots of function matlab
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sin(x)-0.1*x=0 find positive and nonzero roots . thank you
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Walter Roberson
on 11 Dec 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 Comments
Torsten
on 11 Dec 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
on 11 Dec 2021
fzero() can only find one solution at a time; you will need to use several different starting points.
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