雅可比這工作得很好: syms a b x
jacobian ([a*x - a*b, a*b],[a, b])
但這: syms a b(i) x
i = 1:6
jacobian ([a*x - a*b(i), a*b(i)],[a, b(i)])
返回錯誤: Error using sym/jacobian (line 37)
The second argument must
我有以下時間序列: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1948 24.786 24.767 25.117 25.514 26.565 27.374 27.778 28.022 27.827 27.308 26.545 25.620
1949 25.191 24.962 25.038 25.591 26.325 27.044 27.