Index of the row
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Hi,
I have a 5000 by 1 vector and I have a scalar, which is NOT part of the vector. I want to find the row number of the closest value to the scalar in the vector. The vector contains both positive and negative numbers and the scalar can be positive and negative too.
Anyone an idea of how to code this in Matlab.
Many thanks
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Azzi Abdelmalek
le 8 Juil 2016
Modifié(e) : Azzi Abdelmalek
le 8 Juil 2016
[~,idx]=min(abs(your_vector-threshold))
Star Strider
le 8 Juil 2016
This workd:
vector = randi([-99,99], 100, 1); % Create Data
scalar = 100*(rand-0.5); % Create Data
[vs,idx] = sort(vector); % Sort
q = find(vs <= scalar, 1, 'last'); % Find Lowest Close Value
[q2,ixm] = min(vs([q, q+1])); % Mininmum Distance
nearest = vs(q+ixm-1) % Result
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Star Strider
le 8 Juil 2016
The ‘vs’ array is the sorted ‘vector’. The ‘idx’ vector are the original indices of the elements of the sorted vector. If you want the index instead of the value for ‘nearest’, that assignment becomes:
nearest_idx = idx(q+ixm-1)
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