plot_square.m

％The Metabolic Networks Toolbox contains functions to create, ％modify, display, and simulate bioche

function plot_square(x,y,l,col)

% draw a square

fill([x-l/2 x+l/2 x+l/2 x-l/2],[y-l/2 y-l/2 y+l/2 y+l/2],col)