CL_sortMat

Description

• Sorts the rows or columns of a matrix according to the sorting order of a vector.

  - If u is a column vector, the rows of mat will be sorted in the same order as the rows of u.

  - If u is a row vector, the columns of mat will be sorted in the same order as the columns of u.

  - If u is empty (or absent), the values of mat will be sorted if mat is a row or column vector.

  The sorting order is determined by direction (increasing by default).

Parameters

mat:

Matrix (PxN)

u:

(optional) Row or column vector (1xN or Px1) or empty. Default is empty

direction:

(string, optional) Sorting order: "i" = increasing, "d" = decreasing. Default is "i" (1x1)

mat2:

Sorted matrix (PxN)

I:

Sorting index (u_sorted = u(I)) (1xN or Px1)

Authors

• CNES - DCT/SB

Examples

mat = [1,3,2,4; 1000,1010,1020,990; 10,80,15,45]; // Re-arrange "mat" rows using "u" for sorting u = [3;4;2]; [mat2,I] = CL_sortMat(mat,u); mat(I,:) - mat2 // => 0 // Sort 2nd row of "mat" decreasingly, other rows sorted accordingly [mat2, I] = CL_sortMat(mat, mat(2,:), "d"); mat(:,I) - mat2 // => 0 // Sort a row or column vector (increasing order by default) vec = mat(:); [vec2, I] = CL_sortMat(vec); vec(I) - vec2 // => 0