slow down the for loop operation for huge set of datas

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SatyaPrakash Gupta
评论： darova 2020-4-3
Hello Team,
I would like to increase the search operation in quite faster way, the below code i have implemented takes atleast 40mins to complete it because i have very huge data
for i = 1:length(LocationsListData.x) % which is approximately 26532957
idx = inpolygon(X(:),Y(:),LocationsListData.x(i),LocationsListData.y(i)) ;% X and Y has 4196*4196 size for each element
idx(idx==0)=[];
if~isempty(idx)
value(i) = idx;
end
end
do you see any possiblities to reduce the speed ? if so and then how can i do that ?
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SatyaPrakash Gupta
SatyaPrakash Gupta 2020-4-3
Hii Darova,
please find the locationListdata attaced in the below link.
there is no polygon available , i have grid where i use to search for available data in each grid using inpolygon function
https://drive.google.com/drive/folders/1q0cvqyjwUiTGgBHoSfRQlaHDLeosWw_G

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回答（1 个）

Mohammad Sami
Mohammad Sami 2020-4-3
You don't need to use the for loop with the inpolygon function.
idx = inpolygon(X(:),Y(:),LocationsListData.x,LocationsListData.y);

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