why i can't make title in figure?

Answer 1

[Mario Malic]

title(num2str(i))

[Minsik Km]

thank you very much!

Answer 2

[Image Analyst]

Not sure what you want so I've going to show you both alternatives. To set the titlebar caption of the figure, use its Name property. To set the title above an axes, use the title() function:

% Bring up a figure.
hFig = figure;
% Plot something.
plot(cosd(1:360), 'LineWidth', 3);
grid on;
xlabel('x', 'FontSize', 20);
ylabel('y', 'FontSize', 20);
% Maximize figure
hFig.WindowState = 'maximized';
% Give figure a name that depends on variables.
index = 42;
poster = 'Minsik';
figureName = sprintf('%s %d', poster, index); % Whatever you want...
hFig.Name = figureName; % Shows up in the titlebar of the whole window.
% Turn off the number in the figure name:
hFig.NumberTitle = 'off'
% Give the same name to the title over the axes:
title(figureName, 'FontSize', 20);