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I'm trying to figure out what rows 3 and 4 of the e matrix in the MATLAB pdetool represent. According to the documentation:

  • e(3,k) is the parameter value at the first point of edge k. The parameter value is related to the arc length along the geometric edge.
  • e(4,k) is the parameter value at the second point of edge k.

Even with the definition, I can't understand it.

Adriaan
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hakim
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  • Is it not the value of the parameter that you are trying to solve? say e.g. you are using the mesh for temperature on a plate. is `e(3:4,:)` the values of the temperature at those points? Its the first thing that comes to mind, but I have not used it. – Ander Biguri Jan 26 '23 at 14:38
  • @AnderBiguri Thanks for your suggestion but it can't be that as I define my mesh (I find the p,t and e matrices) only from the geometry and before I do the computations by the finite element method. – hakim Jan 26 '23 at 14:46

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