Contains MATLAB codes used to generate Figure 3 and Figure 5 of the manuscript, "Coupling between DNA replication, segregation and the onset of constriction in Escherichia coli". Code used to generate Figure 3 is named Figure_3.m. The code used to generate Figure 5 is present in the Figure 5 folder. The folder contains files- ao_model_change_c.m - Simulates the adder per origin model ch_model_change_c.m - Simulates the Cooper Helmstetter model parallel_adder_change_c.m - Simulates the parallel adder model indep_adder_change_c.m - Simulates the independent adder model call.m - Calls one of the above cell cycle models. The output obtained contains cell cycle characteristics such as C+D period, generation time, length at birth, division, and initiation for multiple cells in a population. These cell cycle characteristics can be plotted against time from the thymine shift. Cell.m - A class that creates an object of type Cell. The object contains all the cell characteristics required during the cell cycle models' simulation. binning_with_error_1.m - Used to get the binned data given the raw data and the bin edges.