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knnsearch(trainingset, testingset, 'K', neighborsvalue) on GPU matlab using parallel processing

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Aysha Ashraf
Aysha Ashraf on 11 Jan 2017
Commented: Hao Zhang on 13 Dec 2018
how to apply knnsearch builtin function of searching the neighbors in GPU using parallel processing , having problem in knnsearch function with Cuda.

Accepted Answer

Joss Knight
Joss Knight on 12 Jan 2017
arrayfun is for applying a scalar operation element-wise across an array. You should not be using it to wrap knnsearch. Just call knnsearch with your gpuArray inputs.
See help gpuArray\knnsearch.
Hao Zhang
Hao Zhang on 13 Dec 2018
But it seems the GPU version of knnsearch only support brute force method, for large data set, it is slower than the CPU version with kdtree algorithm.

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