fplot3d
=======

3D plot of a surface defined by a function



Calling Sequence
~~~~~~~~~~~~~~~~


::

    fplot3d(xr,yr,f,[theta,alpha,leg,flag,ebox])
    fplot3d(xr,yr,f,<opt_args>)




Arguments
~~~~~~~~~

:xr row vector of size n1.
: :yr row vector of size n2.
: :f external of type z=f(x,y).
: :theta,alpha,leg,flag,ebox see `plot3d`.
: :<opt_args> see `plot3d`.
:



Description
~~~~~~~~~~~

`fplot3d` plots a surface defined by the external function `f` on the
grid defined by `xr` and `yr`.

Enter the command `fplot3d()` to see a demo.



Sample
~~~~~~



Examples
~~~~~~~~


::

    `deff`_('z=f(x,y)','z=x^4-y^4')
    x=-3:0.2:3 ;y=x ;
    `clf`_() ;fplot3d(x,y,f,alpha=5,theta=31)




See Also
~~~~~~~~


+ `plot3d`_ 3D plot of a surface


.. _plot3d: plot3d.html