Question

matlab如何绘制二维图像

syms A m g y C
>> y=m*g/(((A*(pi*((2*10^(-3))^2)*cos(32.5*pi/180)-A)/C)-1)*1.2*A);
>> A=((0.31*10^(-2))^2)*pi;
>> g=9.8;
>> C=8*(pi^2)*(2*10^(-2))*((6*10^(-5))^2)*cos(32.5*pi/180);
>> m=0:0.01:5;
>> figure
>> plot(m,y)
错误使用 plot
数据必须为可转换为双精度值的数值、日期时间、持续时间或数组。

Answer 1

syms A m g y C
y=m*g/(((A*(pi*((2*10^(-3))^2)*cos(32.5*pi/180)-A)/C)-1)*1.2*A);
A_num=((0.31*10^(-2))^2)*pi;
g_num=9.8;
C_num=8*(pi^2)*(2*10^(-2))*((6*10^(-5))^2)*cos(32.5*pi/180);
y=subs(subs(subs(y,A,A_num),g,g_num),C,C_num);
m_num=0:0.01:5;
y_num=ones(1,length(m_num));
for i=1:length(m_num)

y_num(i)=subs(y,m,m_num(i));
end
figure
plot(m_num,y_num)

Answer 2

本视频展示如何用matlab绘制散圆状态图，可用于相关科研数据绘图！