How do I make my plots sharp again?

Since I updated to MATLB 2015a, my plots all look like they are drawn with crayon, and when I save them they look a bit fuzzy. I am revising an article where the plots are made with the same script in an earlier version of MATLAB, and they look completley different.

I have tried

set(groot,'DefaultFigureGraphicsSmoothing','off')

but that just makes them jagged.

ax = gca;                       % get current axes

ax.FontSmoothing = 'off';       % turn off axes font smoothing

f.GraphicsSmoothing = 'off';    % turn off figure graphics smoothing

does not seem to do anything either, they still look like crayon.

How do I get my plots sharp again? Is there any way to get the good quality plots back?

[Preethi]

check this http://in.mathworks.com/matlabcentral/answers/225265-is-it-possible-to-use-graphicssmoothing-for-lines-and-not-for-the-figure-box?s_tid=answers_rc1

[Anish Mitra]

Could you share an example? It would be easier to investigate the exact issue.