Saving figure in jpeg

I am trying to save figure in jpeg format and find myself having to create them full screen to get good rendering. However, I cannot control both figure number and position. How do I get around this restriction? The relevant code lines are shown below.

Thanks,

scrsz = get(0,'ScreenSize');

figure(1,'Position',[1 1 scrsz(3) scrsz(4)]);   % generate figure 1 full screen size

Answer 1

[Walter Roberson]

scrsz = get(0,'ScreenSize');
fig = figure(1);
set(fig,'Units','Pixels','Position',[1 1 scrsz(3) scrsz(4)]);

Answer 2

[Andrii]

You can function imwrite. Syntax:imwrite(nameOfElement,'Filename.jpg')

Answer 3

[Image Analyst]

I believe you can save the figures with whatever resolution you want with export_fig. See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_save_my_figure.2C_axes.2C_or_image.3F_I.27m_having_trouble_with_the_built_in_MATLAB_functions.