Why is my functions not plotting a line?

Question

Adriaan Breytenbach 2020-12-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/674388-why-is-my-functions-not-plotting-a-line

编辑： Setsuna Yuuki. 2020-12-2

CBAcode_Q10.m

My equations is working since i can manually change the variable to obtain different Vbar and Abar values, but it can't plot my graph. I have done this before so i dont know why its not working now. I attached the m' file and is also posting a screen shot.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Ameer Hamza 2020-12-2

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/674388-why-is-my-functions-not-plotting-a-line#answer_563238

编辑：Ameer Hamza 2020-12-2

在 MATLAB Online 中打开

Change the lines in your code like this

Wcd=(s.*Wab.*(s+sin(theta)))./(1+s.^2+2.*s.*sin(theta));
                           %^ put a dot here
                           
Acd=(Wab.^2.*s.*cos(theta).*(1-s.^2))./((1+s.^2+2.*s.*sin(theta)).^2);
                                    %^ put a dot here

Read about element-wise operators: https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Setsuna Yuuki. 2020-12-2

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/674388-why-is-my-functions-not-plotting-a-line#answer_563243

编辑：Setsuna Yuuki. 2020-12-2

在 MATLAB Online 中打开

you need add one point

Wab=9.42;
d=0.12;
s=0.1; % 0.3, 0.6 & 0.9
theta=0:0.1:6.28
Wcd=(s.*Wab.*(s+sin(theta)))./(1+s.^2+2.*s.*sin(theta)); %add point before /
Vbar=Wcd.*d
Acd=(Wab.^2.*s.*cos(theta).*(1-s.^2))/((1+s.^2+2.*s.*sin(theta)).^2);
Abar=Acd.*d
plot(theta,Vbar), grid on;
xlabel('theta(rad)'), ylabel('Acceleration of bar CD(rad/s^2)')
title('Acceleration vs theta @ s=0.1')