Median Filter Example in image processing

C=[0.9 .9 0 .1 .5 .4;.8 .9 .1 .2 .5 .5;.2 0 .9 .1 .4 .4;.1 .1 0 .2 .1 .2;.5 .4 .4 .4 .2 .1;.8 .5 .9 .4 .2 0]
D=medfilt2(C)