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

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Aysha Ashraf 2017-1-11

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https://ww2.mathworks.cn/matlabcentral/answers/319929-knnsearch-trainingset-testingset-k-neighborsvalue-on-gpu-matlab-using-parallel-processing

评论： Hao Zhang 2018-12-13

how to apply knnsearch builtin function of searching the neighbors in GPU using parallel processing , having problem in knnsearch function with Cuda.

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Answer 1

Joss Knight 2017-1-12

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https://ww2.mathworks.cn/matlabcentral/answers/319929-knnsearch-trainingset-testingset-k-neighborsvalue-on-gpu-matlab-using-parallel-processing#answer_250319

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.

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Joss Knight 2017-1-23

编辑：Joss Knight 2017-1-23

I'm sure! Probably you don't have R2016b.

http://www.mathworks.com/help/stats/release-notes.html

Hao Zhang 2018-12-13

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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