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例如你有下面这个问题：
syms a b y(t)
dsolve(diff(y) == a*y, y(0) == b)
计算结果：
ans =
b*exp(a*t)

然后
定义一个新的数组t_numerical = 0:0.01:1
y_numerical = b*exp(a*t_numerical);

plot(t_numerical, y_numerical)

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8楼2012-03-27 21:52:46

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jjwang: 金币+5, ★有帮助 2012-03-28 09:30:23

解析解没法获得
>> dsolve('Ds=3*(40+5*(s-7+4*t))^(3/2)/s^2-4','s(0)=a','t')
Warning: Explicit solution could not be found.
> In dsolve at 101

ans =

[ empty sym ]

这个可以用matlab中的数值微分方程解法 ode解算器

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