Matrix for double pendulum not populating last column

Akshay

2014 11 1

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Hi, I have written this code to solve a double pendulum using ode 45 but the last column isn't populating. Any idea why?

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Zoltán Csáti 2014-11-1

Could you show your paper work? Perhaps you committed a typo.

Jan 2014-11-1

I've formatted the code.

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Youssef Khmou 2014-11-2

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This problem is sensitive to initial conditions, you can start by checking the equations, or values given to variables. In function callpen if for example you change the displacement b to 2.99 instead of 3, the fourth column changes : [0,0.0113,0.0225,0.0338,....,0.6760]