function map = colormap(arg1,arg2)

%COLORMAP Color look-up table.

%   COLORMAP(MAP) sets the current figure's colormap to MAP.

%   COLORMAP('default') sets the current figure's colormap to

%   the root's default, whose setting is PARULA.

%   MAP = COLORMAP returns the three-column matrix of RGB triplets defining 

%   the colormap for the current figure.

%   COLORMAP(FIG,...) sets the colormap for the figure specified by FIG.

%   COLORMAP(AX,...) sets the colormap for the axes specified by AX. 

%   Each axes within a figure can have a unique colormap. After you set

%   an axes colormap, changing the figure colormap does not affect the axes.

%   MAP = COLORMAP(FIG) returns the colormap for the figure specified by FIG.

%   MAP = COLORMAP(AX) returns the colormap for the axes specified by AX.

%

%   A color map matrix may have any number of rows, but it must have

%   exactly 3 columns.  Each row is interpreted as a color, with the

%   first element specifying the intensity of red light, the second

%   green, and the third blue.  Color intensity can be specified on the

%   interval 0.0 to 1.0.

%   For example, [0 0 0] is black, [1 1 1] is white,

%   [1 0 0] is pure red, [.5 .5 .5] is gray, and

%   [127/255 1 212/255] is aquamarine.

%

%   Graphics objects that use pseudocolor  -- SURFACE and PATCH objects,

%   which are created by the functions MESH, SURF, and PCOLOR -- map

%   a color matrix, C, whose values are in the range [Cmin, Cmax],

%   to an array of indices, k, in the range [1, m].

%   The values of Cmin and Cmax are either min(min(C)) and max(max(C)),

%   or are specified by CAXIS.  The mapping is linear, with Cmin

%   mapping to index 1 and Cmax mapping to index m.  The indices are

%   then used with the colormap to determine the color associated

%   with each matrix element.  See CAXIS for details.

%

%   Type HELP GRAPH3D to see a number of useful colormaps.

%

%   COLORMAP is a function that sets the Colormap property of a figure.

%

%   See also HSV, CAXIS, SPINMAP, BRIGHTEN, RGBPLOT, FIGURE, COLORMAPEDITOR.

%   Copyright 1984-2017 The MathWorks, Inc.

import matlab.graphics.internal.*;

arg = 0; 

if (nargin == 0) 

    figH = gcf;

elseif (isCharOrString(arg1))||(length(arg1) > 1)||isempty(arg1) 

    % string input (check for valid option later)

    if (nargin == 2) 

        error(message('MATLAB:colormap:InvalidFirstArgument'));

    end

    figH = gcf; 

    if (isCharOrString(arg1)) 

        arg = lower(arg1);

    else 

        arg = arg1; 

    end 

else

    % figH can be any object that can contain a colormap

    figH = getMapContainer(arg1);

    if isempty(figH)

        error(message('MATLAB:colormap:NeedScalarHandle'));

    end

    % check for string option

    if nargin == 2

        if (isCharOrString(arg2))

            arg = lower(arg2);

        else

            arg = arg2;

        end

    end

end 

if isequal(arg,0) 

    map = get(figH, 'Colormap');

    return

end

if isCharOrString(arg) 

    % For indexing purpose, convert arg to char.

    arg = char(arg);

    if strcmp(arg,'default')        

        fig = ancestor(figH,'figure');

        defaultMap = get(fig,'defaultfigureColormap');

        set(figH,'Colormap',defaultMap);

        return;

    end

    k = min(strfind(arg,'('));

    if ~isempty(k)

        arg = feval(arg(1:k-1),str2double(arg(k+1:end-1)));

    else

        arg = feval(arg);

    end

end

if ~isempty(arg) 

    if (size(arg,2) ~= 3) 

        error(message('MATLAB:colormap:InvalidNumberColumns'));

    end

    if min(min(arg)) < 0 || max(max(arg)) > 1 

        error(message('MATLAB:colormap:InvalidInputRange'))

    end

end 

    set(figH, 'Colormap', arg);     

    if nargout == 1 

        map = get(figH, 'Colormap');

    end

end