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## Re: [Octave forge] [bim package] bim1a_advection*

**From**: |
JuanPi |

**Subject**: |
Re: [Octave forge] [bim package] bim1a_advection* |

**Date**: |
Sat, 11 Jan 2020 17:41:17 +0100 |

>* Instead of passing the vector field BETA directly one can pass a*
>* piecewise linear conforming scalar function PHI as the last input.*
>* In such case BETA = grad PHI is assumed.*
Looking at the source code I see that actually it is BETA = diff PHI,
not grad PHI what is used (I see now why you were puzzled)
Another misleading documentation point, if I understand correctly.
Why not using the function gradient, instead of diff to compute these steps?
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