May be this link can help

http://stackoverflow.com/questions/6245626/matlab-filling-in-the-area-between-two-sets-of-data-lines-in-one-figure

Take a look to this link

http://jvoigts.scripts.mit.edu/blog/nice-shaded-plots/

May be this link can help

http://stackoverflow.com/questions/6245626/matlab-filling-in-the-area-between-two-sets-of-data-lines-in-one-figure

Here's an example (I tested this with GNU Octave 3.6, should also work with Matlab):

octave:202> x = [1:100]; % x values

octave:203> y = sin(x/10) + 0.3*rand(size(x)); % y values

octave:204> dy = 0.1 + 0.2*rand(size(x)); % width of shading (y uncertainty?)

octave:205>

octave:205> clf; % clear figure (just in case something was there before)

octave:206>

octave:206> % draw shading behind plot line:

octave:206> X = [ x fliplr(x) ];

octave:207> Y = [ y-dy fliplr(y+dy) ];

octave:208> col = [1 0.5 0.5];

octave:209> patch (X,Y,'facecolor',col,'edgecolor',col); hold on;

octave:210>

octave:210> % plot line

octave:210> plot (x,y,'r','linewidth',2); hold off;