poiindex - Indices of points in canonical ordering for rectangular grid
Syntax
[n1,n2,h1,h2,i,c,ii,cc]=poiindex(p,e,t,sd)
Description
[n1,n2,h1,h2,i,c,ii,cc]=poiindex(p,e,t,sd) identifies
a given grid p, e, t in
the subdomain sd as an evenly spaced rectangular
grid. If the grid is not rectangular, n1 is 0 on
return. Otherwise n1 and n2 are
the number of points in the first and second directions, h1 and h2 are
the spacings. i and ii are of
length (n1-2)*(n2-2) and contain indices of interior
points. i contains indices of the original mesh,
whereas ii contains indices of the canonical ordering. c and cc are
of length n1*n2-(n1-2)*(n2-2) and contain indices
of border points. ii and cc are
increasing.
In the canonical ordering, points are numbered from left to
right and then from bottom to top. Thus if n1=3 and n2=5,
then ii=[5 8 11] and cc=[1 2 3 4 6 7
9 10 12 13 14 15].
See Also
| poiasma | Partial Differential Equation Toolbox |
| poisolv | Partial Differential Equation Toolbox |
 | poicalc | | poimesh |  |
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