some I/O:
readPlist: reads a polygonal list given as textfile (*.pl) int n x 2 Matrix, representing the vertices of a polygon (each row: x,y)


some Graphics:
plotSlist: plots the list. has some parameters, please have a look (help plotslist)


some code:
evolution: the discrete curve evolution (DCE), main input and output: polygonal list



try: 
s=readList(listname);
se=evolution(s,0,0.34);
plotSlist(s)
figure
plotSlist(se);



