On 5 January 2015 at 20:12, Swaroop Guntupalli <[email protected]> wrote:
> My use case is a bit different from the intended one. Let me know if > this approach of using SQEs for that makes sense: > I want to get voxels corresponding to nodes at a particular > hop/distance from a center node (not less than or equal to that > distance). This is similar to HollowSphere in volume searchlights. One > approach I am thinking of is to use multiple SQEs at difference hops > and eliminate nodes from SQE with smaller radius. I already have > SurfaceVerticesQueryEngine with r=0, which lets me get voxels assigned > to any particular node, so that I can quickly get all voxels > associated with any set of nodes. > Yes, that could work. > > Since my initial email, I thought of another approach by using SVQE > with largest radius I want and using 'center_distances' to get voxels > at a particular distance. I am assuming those are Euclidean distances > from center node, is that correct? No, they are the node-to-node distance* between the center node and the selected node (in the case of a volumetric dataset, the "selected node" means the node associated with that voxel). * which distance depends on the selected distance metric, so it could be Dijkstra or Euclidean. > Eitherway, is there a way to pass > that 'fa' to Measure along with the dataset using standard > Searchlight()? > I haven't tried it, but looking at measures/searchlight.py it seems that that should probably work. Please let us know if you run into issues.
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