Filling different regions of a figure with different colous/patterns

Hello! I have a figure plotted between say y=sin(x) and (x) where x=0:pi/18:2*pi. I would like create 3 regions as defined blow, on the figure and fill with differet colurs or patterns.

Region1:y<-0.5 Region2:-0.5<=y<=0.5 Region3:y>0.5

How to do it in matlab?

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/matlab/ref/area.html

[Purushottama Rao]

Thanks