On Nov 28, 2012, at 5:15 PM, Adrian Jacobo wrote:

>  I'm solving an equation in 3d and I need to calculate the integral of the 
> field. What is the most convenient/fast way of doing this?


int = var.cellVolumeAverage * var.mesh.numberOfCells


>  A related question: how can I access individual points of the field? Right 
> now, to access the point C(x,y,z) I'm doing C(((x,),(y,),(z,))), where C is a 
> CellVariable over a Grid3d mesh. This seems cumbersome (an I don't fully 
> understand the notation, I just found it in an example). Is there a cleaner 
> way of doing it?

The C(points) notation is intended to return the value of C at multiple points. 
You specify the points with a list of lists (or a tuple of tuples, as you have 
done): 

[[x1, x2, x3, ...],
 [y1, y2, y3, ...],
 [z1, z2, z3, ...]]

For a single point, I guess this is a bit cumbersome, but the idea is that it's 
symmetrical with things like var.cellCenters.
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