Hi,

I'm trying to solve a pretty complex system of equations (a 3rd order DAE with 61 equations) using the MEBDFI numeric solver but I'm always getting the following error.

error in dsolve/dae/numeric/sm_intersect. numeric exception, division by zero

I have tried to find out what the sm_interesect command is but I haven't had luck neither in Internet nor in Maple help. I have looked for similar posts...

Hi,

I'm trying to modify the size of the window where an animation is shown. Tipically, this window has axis going from xmin to xmax and ymin to ymax but this causes some scaling problems when xmax-xmin>>ymax-ymin. I would like to focus in a certain region of my animation and change this viewpoint depending on the position of the elements of the animation. Can anybody help me?

This is my code:

> tf := 5;
> nfr := 201;

Hi,

I'm having some problems with the generation of the typical stiffness matrices seen in FEA formulations. I have got an elementary matrix that is looped through the entire stiffness matrix to generate it. As there is juxtaposition between the elementary matrices, there is some recursive assignment involved that I can't handle properly. Here is the code for a 6x6 elementary matrix with a 3x3 juxtaposition. n is the nombre of recursions needed to fill the stiffness matrix. M is the elementary matrix