How can i have contour lines invisible in contourf?

Lately I purchased a 2017a student licence. Until then I used the institution's licence for 2016a where I could have lines invisible by setting "linewidth" to zero. The 2017a version alerts for error when I use this method. Is there another way to make the lines invisable?

[KSSV]

If you want to make lines invisible...why to plot in first place?

Answer 1

[Star Strider]

In R2017a, set 'LineStyle' to 'none':

figure(1)
Z = peaks(20);
contourf(Z,10, 'LineStyle','none')

Answer 2

[Stalin Samuel]

   [cs,hc]=contourf(args);
   set(hc,'EdgeColor','none')