how can I save a file as .png format?

I have a folder with 20 files in .fig format, how can I save these files in .png format? (they have different names and I want the programm to save the files after some changes.

thanks

Answer 1

[Azzi Abdelmalek]

f=dir('*.fig') % or adsd your folder
for k=1:numel(f)
  name=f(k).name;
  h=hgload(name);
  new_name=strrep(name,'.fig','.png');
  saveas(h,new_name);
close
end

Answer 2

[David Sanchez]

h=plot(rand(10,1),rand(10,1))
saveas(h,'my_fig','fig'); % your figure is saves as *.fig

% code to print a saved *.fig into *.png
  figure_handle = openfig('my_fig.fig');
  print(figure_handle,'-dpng','my_fig.png')

[Mohammad]

thank you, but the files have different names, and some times I dont know the names. what should I put instead my_fid.fig then? can you tell me also how can I open a file with .fig format ( between 20 files in .fig format in a folder), do some changes and save it with the same name but in .png format? Thank you so much.