How to find the index of the n smallest elements in a vector

by

You can use the sort function. To get the smallest n elements, you can write a function like this:

function [smallestNElements smallestNIdx] = getNElements(A, n)
     [ASorted AIdx] = sort(A);
     smallestNElements = ASorted(1:n);
     smallestNIdx = AIdx(1:n);
end

Let’s try with your array:

B = [48.4766 47.3743 59.5736 59.7450 55.0489 58.2620 63.3865 50.1101];
[Bsort Bidx] = getNElements(B, 4);

returns

BSort = 
    47.3743   48.4766   50.1101   55.0489
Bidx = 
    2 1 8 5

More Related Contents:

  1. How to interpolate with MATLAB 3D usind scatteredinterpolant plot? [closed]
  2. how to get a single feature vector from SIFT descriptor [closed]
  3. Is it possible to define more than one function per file in MATLAB, and access them from outside that file?
  4. How to get all files under a specific directory in MATLAB?
  5. Generate random number with given probability matlab
  6. Matlab: Running an m-file from command-line
  7. Hash tables in MATLAB
  8. Find given row in a matrix
  9. Use a vector as an index to a matrix
  10. How to concatenate a number to a variable name in MATLAB?
  11. Suppressing a function’s command window output
  12. Align already captured rgb and depth images
  13. How to normalize / denormalize a vector to range [-1;1]
  14. How do I get the second return value from a function without using temporary variables?
  15. Matlab Template Matching Using FFT
  16. Matlab file name with zero-padded numbers
  17. How can I sort a 2-D array in MATLAB with respect to one column?
  18. Attempt to execute script as a function
  19. What are some efficient ways to combine two structures in MATLAB?
  20. Difference of handle and values classes
  21. MATLAB: Differences between .mat versions
  22. In Matlab, is it possible to terminate a script, but save all its internal variables to workspace?
  23. How to change an image from Cartesian to Polar coordinates in Matlab?
  24. How to obtain static member variables in MATLAB classes?
  25. Machine learning – Linear regression using batch gradient descent
  26. Extract arbitrarily rotated plane of data from 3D array as 2D array
  27. Select largest object in an image
  28. Efficiently compute a 3D matrix of outer products – MATLAB
  29. MATLAB Compiler vs MATLAB Coder
  30. Skipping outputs with anonymous function in MATLAB

Leave a Comment