sort
Sort an array.
`(y, ind)=sort(a)`
 Inputs `a` Any matrix or a one-dimensional array of strings. Outputs `y` The sorted array. `ind` The array of indices that may be used to construct `y` from `a` .

Description
If `a` is a vector, the output is the sorted vector, with `ind` bing an array of indices of `a` such that `y=a(ind)` .

If `a` is a matrix, each column of the `y` is the vector of sorted elements if the corresponding elements of `a` , with the sorting indices being the elements of the corresponding elements of `ind` , such that `y[:,j]=a[:,ind[:,j]]` .

If `a` is a matrix, the sorted matrix `y` can be obtained from `a` and `ind` by using the call `shuffle(a,ind)` .
Example
```>>a=[ [2 1 3 4]' fix(rand(4,4)*100)]
>>b=[ [2 1 3 4]' fix(rand(4,4)*100)]
>>a
2         72          8         79         13
1         21         40         96         55
3         76         34         23         91
4         82          3         70         89

>>b
2         17         28         75         55
1         79         70          7          7
3         92         87         91         17
4         93         98         24         51

>>[sa,ind]=sort(a)
>>sa  // all columns of sa are in ascending order.
1         21          3         23         13
2         72          8         70         55
3         76         34         79         89
4         82         40         96         91
>>shuffle(a,ind) // ind and 'shuffle' can be used to sort a
1         21          3         23         13
2         72          8         70         55
3         76         34         79         89
4         82         40         96         91
>>// If the rows of the the columns of a and b are related in some fashion
>>// shuffle(b, ind) can be used to get the same ordering of the rows
>>// of the columns of b as sort(a) yields for the columns of a.
>>shuffle(b,ind)
1         79         98         91         55
2         17         28         24          7
3         92         87         75         51
4         93         70          7         17
```