Sometimes, you need a plot which compares about 10 different methods. In that case there is a particular need for each line in the plots to look different, here is a neat function:(big thanks to harsh agrawal for finding this)
http://www.mathworks.com/matlabcentral/fileexchange/29702-generate-maximally-perceptually-distinct-colors/content//distinguishable_colors.m
http://www.mathworks.