cumprodc
==============================================

Purpose
----------------

Computes the cumulative products of the columns of a matrix.

Format
----------------
.. function:: y = cumprodc(x)

    :param x:
    :type x: NxK matrix

    :return y: containing the cumulative products of the columns of *x*.

    :rtype y: NxK matrix

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

::

    x = { 1 -3,
          2  2,
          3 -1 };

    y = cumprodc(x);

Now if you view *y*, you will see:

::

        1.000 -3.000
    y = 2.000 -6.000
        6.000  6.000

Remarks
-------

This is based on the recursive series :func:`recsercp`. :func:`recsercp` could be called
directly as follows:

::

   recsercp(x, zeros(1, cols(x)));

to accomplish the same thing.

Source
------------

cumprodc.src

.. seealso:: Functions :func:`cumsumc`, :func:`recsercp`, :func:`recserar`