sortind, sortindc
==============================================

Purpose
----------------
Returns the sorted index of *x*.

Format
----------------
.. function:: ind = sortind(x)
              ind = sortindc(x)

    :param x: data
    :type x: Nx1 column vector

    :return ind: represents sorted index of *x*.

    :rtype ind: Nx1 vector

Examples
----------------

::

    // Create uniform random integers between 0 and 10
    x = round(10*rndu(10, 1));

    ind = sortind(x);
    y = x[ind];

After running the above code:

::

          9.00
          8.00
    x  =  0.00
          4.00
          6.00

          3.00
          4.00
    ind = 5.00
          2.00
          1.00

          0.00
          4.00
    y  =  6.00
          8.00
          9.00

Remarks
-------

:func:`sortind` assumes that *x* contains numeric data. :func:`sortindc` assumes that *x*
contains character data.

This function can be used to sort several matrices in the same way that
some other reference matrix is sorted. To do this, create the index of
the reference matrix, then use :func:`submat` to rearrange the other matrices in
the same way.