function grid(varargin)

%GRID   Grid lines.

%   GRID ON adds major grid lines to the current axes.

%   GRID OFF removes major and minor grid lines from the current axes. 

%   GRID MINOR toggles the minor grid lines of the current axes.

%   GRID, by itself, toggles the major grid lines of the current axes.

%   GRID(AX,...) uses axes AX instead of the current axes.

%

%   GRID sets the XGrid, YGrid, and ZGrid properties of

%   the current axes. If the axes is a polar axes then GRID sets

%   the ThetaGrid and RGrid properties. If the axes is a geoaxes, then GRID

%   sets the Grid property.

%

%   AX.XMinorGrid = 'on' turns on the minor grid.

%

%   See also TITLE, XLABEL, YLABEL, ZLABEL, AXES, PLOT, BOX, POLARAXES.

%   Copyright 1984-2019 The MathWorks, Inc.

% To ensure the correct current handle is taken in all situations.

isaxarr=matlab.graphics.chart.internal.objArrayDispatch(@grid,varargin{:}); 

if isaxarr 

    return

end 

opt_grid = 0; 

if nargin == 0 

    ax = gca;

    % Chart subclass support

    if isa(ax,'matlab.graphics.chart.Chart')

        grid(ax);

        return

    end

else 

    arg1=varargin{1}; 

    if isempty(arg1) 

        opt_grid = lower(arg1);

    end 

    if matlab.graphics.internal.isCharOrString(arg1) 

        % string input (check for valid option later)

        if nargin == 2

            error(message('MATLAB:grid:FirstArgAxes'))

        end

        ax = gca;        

        opt_grid = lower(arg1);

        % Chart subclass support

        if isa(ax,'matlab.graphics.chart.Chart')

            grid(ax,opt_grid);

            return

        end

    else 

        if ~any(isgraphics(arg1,'axes') ... 

                | isgraphics(arg1,'polaraxes') ... 

                | isgraphics(arg1,'geoaxes'),'all') 

            error(message('MATLAB:grid:FirstArgAxes'));

        end 

        ax = arg1; 

        % check for string option

        if nargin == 2 

            opt_grid = lower(varargin{2}); 

        end 

    end 

end 

if (isempty(opt_grid)) 

    error(message('MATLAB:grid:UnknownOption'));

end 

names = get(ax,'DimensionNames'); 

xgrid = [names{1} 'Grid']; 

ygrid = [names{2} 'Grid']; 

zgrid = [names{3} 'Grid']; 

xminorgrid = [names{1} 'MinorGrid']; 

yminorgrid = [names{2} 'MinorGrid']; 

zminorgrid = [names{3} 'MinorGrid']; 

matlab.graphics.internal.markFigure(ax); 

%---Check for bypass option

if isappdata(ax,'MWBYPASS_grid') 

   mwbypass(ax,'MWBYPASS_grid',opt_grid);

elseif isgraphics(ax,'geoaxes') 

    % geoaxes only has 1 Grid property and does not have a minor grid

    if isequal(opt_grid, 0)

        if (strcmp(get(ax,'Grid'),'off'))

            set(ax,'Grid','on');

        else

            set(ax,'Grid','off');

        end

    elseif (strcmp(opt_grid, 'on'))

        set(ax,'Grid','on');

    elseif (strcmp(opt_grid, 'off'))

        set(ax,'Grid','off');

    elseif (strcmp(opt_grid, 'minor'))

        error(message('MATLAB:Chart:UnsupportedArgument','grid','geoaxes'));

    else

        error(message('MATLAB:grid:UnknownOption'));

    end

elseif isequal(opt_grid, 0) 

    if (strcmp(get(ax,xgrid),'off'))

        set(ax,xgrid,'on');

    else

        set(ax,xgrid,'off');

    end

    if (strcmp(get(ax,ygrid),'off'))

        set(ax,ygrid,'on');

    else

        set(ax,ygrid,'off');

    end

    if hasZProperties(handle(ax))

        if (strcmp(get(ax,zgrid),'off'))

            set(ax,zgrid,'on');

        else

            set(ax,zgrid,'off');

        end

    end

elseif (strcmp(opt_grid, 'minor')) 

    if (strcmp(get(ax,xminorgrid),'off'))

        set(ax,xminorgrid,'on');

    else

        set(ax,xminorgrid,'off');

    end

    if (strcmp(get(ax,yminorgrid),'off'))

        set(ax,yminorgrid,'on');

    else

        set(ax,yminorgrid,'off');

    end

    if hasZProperties(handle(ax))

        if (strcmp(get(ax,zminorgrid),'off'))

            set(ax,zminorgrid,'on');

        else

            set(ax,zminorgrid,'off');

        end

    end

elseif (strcmp(opt_grid, 'on')) 

    set(ax,xgrid, 'on', ... 

           ygrid, 'on'); 

    if hasZProperties(handle(ax)) 

        set(ax,zgrid, 'on'); 

    end 

elseif (strcmp(opt_grid, 'off'))

    set(ax,xgrid, 'off', ...

           ygrid, 'off', ...

           xminorgrid, 'off', ...

           yminorgrid, 'off');

    if hasZProperties(handle(ax))

        set(ax,zgrid, 'off');

        set(ax,zminorgrid, 'off');

    end

else

    error(message('MATLAB:grid:UnknownOption'));

end