error in figure print

I am trying to run this code but i get error message

% if figname set, use it; otherwise the data file name

if isfield(cfg, 'figname') && ~isempty(cfg.figname),

set(gcf, 'Name', sprintf('Fig.%d: %s', gcf, cfg.figname), 'NumberTitle', 'off');

elseif isfield(cfg, 'datafile') && ~isempty(cfg.datafile),

slashpos = find(cfg.datafile == '/' | cfg.datafile == '\', 1, 'last');

if ~isempty(slashpos), cfg.datafile = cfg.datafile(slashpos+1:end); end;

set(gcf, 'Name', sprintf('Fig.%d: %s', gcf, cfg.datafile), 'NumberTitle', 'off');

else % shorten the figure name anyway

set(gcf, 'Name', sprintf('Fig.%d', gcf), 'NumberTitle', 'off');

end;

what does this mean?

"Error using sprintf Function is not defined for 'matlab.ui.Figure' inputs"

Answer 1

[Walter Roberson]

You have two calls to sprintf in which you ask to format gcf

Change those two gcf to be double(gcf)

[mado]

you mean this

set(double(gcf), 'Name', sprintf('Fig.%d: %s', gcf, cfg.datafile), 'NumberTitle', 'off');

it give the same error

[Voss]

cfg = [];

% if figname set, use it; otherwise the data file name
if isfield(cfg, 'figname') && ~isempty(cfg.figname),
    set(gcf, 'Name', sprintf('Fig.%d: %s', double(gcf), cfg.figname), 'NumberTitle', 'off');
elseif isfield(cfg, 'datafile') && ~isempty(cfg.datafile),
    slashpos = find(cfg.datafile == '/' | cfg.datafile == '\', 1, 'last');
    if ~isempty(slashpos), cfg.datafile = cfg.datafile(slashpos+1:end); end;
    set(gcf, 'Name', sprintf('Fig.%d: %s', double(gcf), cfg.datafile), 'NumberTitle', 'off');
else % shorten the figure name anyway            
    set(gcf, 'Name', sprintf('Fig.%d', double(gcf)), 'NumberTitle', 'off');
end

get(gcf,'Name')

ans = 'Fig.1'