extracting information from structer under specific conditions

Question

Abdelwahab Fawzy 2016-7-16

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/295990-extracting-information-from-structer-under-specific-conditions

回答： Azzi Abdelmalek 2016-7-16

if there is a structure for 100 nodes. the three fields of the structure are (xd , yd and ID) where,,

xd--> X-dimension , yd--> Y_dimension , ID ==> node's order or its ID

and i have a matrix DIM(5,2) which contains the dimensions of 5 nodes where , DIM(:,1) --> refer to xd , DIM(:,2) --> refer to yd

now i want to know the ID of these 5 nodes

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Answer 1

Azzi Abdelmalek 2016-7-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/295990-extracting-information-from-structer-under-specific-conditions#answer_228828

在 MATLAB Online 中打开

%--------Example-----------------------------------------------------------
A=struct('xd',num2cell(randi(100,100,1)),'yd',num2cell(randi(100,100,1)),'ID',num2cell(rand(100,1)))
b=[[A.xd]' [A.yd]']
M=b(randperm(100,5),:)
%------The code-------------------------------------
N=cell2mat(struct2cell(A)')
idx=ismember(N(:,1:2),M,'rows')
ID=N(idx,3)