// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA, Serge Steer
// Copyright (C) - 2010 - DIGITEO - Michael Baudin
// Copyright (C) DIGITEO - 2011 - Allan CORNET
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution.  The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt

function z = atand(x,y)
    //Inverse tangent, result in degrees.

    rhs = argn(2);
    if rhs < 1 then
        error(msprintf(gettext("%s: Wrong number of input argument(s): %d expected.\n"),"atand", 1));
    end

    if type(x) <> 1 | ~isreal(x) then
        error(msprintf(gettext("%s: Wrong type for input argument #%d: Real matrix expected.\n"),"atand",1));
    end

    if argn(2)==2 then
        if type(y) <> 1 | ~isreal(y) then
            error(msprintf(gettext("%s: Wrong type for input argument #%d: Real matrix expected.\n"),"atand",2));
        end
        z = 180/%pi*atan(x,y);
    else
        z = 180/%pi*atan(x);
    end
endfunction