(a) FixingX1within a narrow range (~0.26), four instances ofX1are found (solid red circles). Fixing X1 within another narrow range (~0.6) provides three instances of X1 (solid orange circles). Similarly, two instances of X1 are found for X1 ~1.26 (solid blue circles). (b) Collection of 34 “bins” that exhibit the number of times X1 has approximately the same value given on the x-axis; the range of each bin was chosen as 0.05. Among the 34 bins, 9 bins have at least two instances of the same X1; all other bins are discarded. (c) Representation of different X2 values corresponding to at least two X1 values in each of the 9 remaining bins. The bars connect the two or more X2 values in each bin.
Chou and Voit BMC Systems Biology 2012 6:84 doi:10.1186/1752-0509-6-84