finding an array of roots?

Question

Raphael Hatami 2019-10-1

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/483087-finding-an-array-of-roots

回答： Raphael Hatami 2019-10-1

Hello, I'm trying to find the root of f with respect to phi, given multiple values of theta. However, when doing this, it calculates phi to be a single value, though it should be mutiple values given that theta is mutiple values. Below is my code, can anybody see what I'm doing wrong? Thank you

R = .5 %m
L = 1.25 %m
H = .25 %m
N = 100
theta = linspace(0, 4*pi, N);
for i = 1:N
fphi = @(phi) R*sin(theta(i)) + L*sin(phi) - H;
phi = fzero(fphi, phi)
end

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Answer 1

KALYAN ACHARJYA 2019-10-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/483087-finding-an-array-of-roots#answer_394330

编辑：KALYAN ACHARJYA 2019-10-1

在 MATLAB Online 中打开

Is this?

R=.5; %m
L=1.25; %m
H=.25; %m
N=100
phi=0;
theta=linspace(0, 4*pi, N);
for i=1:N
fphi=@(phi) R*sin(theta(i)) + L*sin(phi) - H;
phi=fzero(fphi,phi)
end

Or

R=.5; %m
L=1.25; %m
H=.25; %m
N=100;
phi=zeros(1,N);
theta=linspace(0, 4*pi, N);
for i=1:N
fphi=@(phi) R*sin(theta(i)) + L*sin(phi) - H;
phi(i)=fzero(fphi,phi(i));
end
phi