how to save figures without margin?

as the title, I need to save the figures or images shown in the figure with the same size of the image.

but there are always margins as shown in the following: (the size is 604x593)

the orginal image is : (the size is 500x430)

how to save figures without margin?

Answer 1

[Valeriy]

Try:

axis off;                     %  If you have axis titles, labels, etc.
set (gca,'Position',[0 0 1 1]);                                      
print(gcf,'Test.jpg', '-djpeg', '-r300');

[Maximiliano Barbosa]

Thank you

[Nick Tsui]

There are still some margins on both left and right sides of the image.