error index exceeds matrix dimension. I am not using matrix

1 次查看（过去 30 天）
Muhammad Salahul Din
评论： Sunny Katyara 2019-4-8
syms th d alpha a th1 th2 l1 l2 lc1 lc2 I1z I2z m1 m2
d(1,1)=m1*lc1^2+m2*(l1^2+lc2^2+2*lc2*l1*cos(th2))+I1z+I2z;
d(1,2)=m2*(lc2^2+l1*lc2*cos(th2))+I2z;
diff(d(1,2),th(1))+diff(d(1,1),th(2))
Index exceeds matrix dimensions.

请先登录，再回答此问题。

采纳的回答

KSSV
KSSV 2017-12-4
syms th d alpha a th1 th2 l1 l2 lc1 lc2 I1z I2z m1 m2
d(1,1)=m1*lc1^2+m2*(l1^2+lc2^2+2*lc2*l1*cos(th2))+I1z+I2z;
d(1,2)=m2*(lc2^2+l1*lc2*cos(th2))+I2z;
diff(d(1,2),th1)+diff(d(1,1),th2)
It should be th1 and th2 not th(1), th(2)
  3 个评论
显示 1更早的评论
Sunny Katyara
Sunny Katyara 2019-4-8
Dear Muhammad Salahul Din, did you find the christoffel symbols? Can you share the code here Please?

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Symbolic Math Toolbox 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by