I need help arranging two vectors

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Colt Davis
Colt Davis on 15 Mar 2015
Commented: Colt Davis on 15 Mar 2015
Suppose I have an area vector, composed of two vectors, length and width multiplied together. If I arrange the area from low to high how can I arrange my vector of length and width to match the entries used in the newly arranged area vector. Example: Area(1) = 200, Length(1) = 100, Width(1) = 2, after I sort vector Area, Area(1) moves to Area(3), how do I move Length(1) to Length(3) and also Width(1) to Width(3). Note, my array has 5000 entries.

Answers (2)

David Young
David Young on 15 Mar 2015
[AreaSorted, idx] = sort(Area);
LengthSorted = Length(idx);
WidthSorted = Width(idx);

Guillaume
Guillaume on 15 Mar 2015
Use the second return value of sort which is the original index of the sorted values. Use it to reorder your width and height vector:
width = [5 10 15 20];
height = [14 11 8 5];
area = width .* height;
[area, origidx] = sort(area);
width = width(origidx)
height = height(origidx)

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