** Sort in ascending order. **

** SORT(X) sorts each column of X in ascending order. **

** When X is complex, the elements are sorted by ABS (X). **

** [Y, I ] = SORT(X) also returns an index matrix I . **

** If X is a vector, then Y = X( I ). **

** If X is an m-by-n matrix, then **

** for j = 1:n, Y(:,j) = X( I (:,j),j). **

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** See also MIN , MAX . **

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