create function that saves figures as png in matlab

main.m
function save_figure_as_png(filename)
% This function saves the current MATLAB figure as a PNG file.
% Inputs:
%   - filename: the name of the PNG file to save (optional).
%               If unspecified, the default filename 'figure.png' is used.
% Usage:
%   - Call this function from within a MATLAB script or command window,
%     after plotting your data and customizing your figure as desired.

% If no filename is provided, set a default name of 'figure.png'
if nargin<1
    filename = 'figure.png';
end

% Get the current figure handle
fig = gcf;

% Save the figure as a PNG file
print(fig, '-dpng', filename);
end
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main.m
% Generate some example data to plot
x = 0:0.01:2*pi;
y = sin(x);

% Plot the data as a solid blue line
plot(x, y, 'b-', 'linewidth', 2);

% Customize the figure as desired (e.g., set axis labels, title, etc.)

% Save the figure as a PNG using our custom function
save_figure_as_png('my_figure.png');
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