Hi all, i have had to use ode45 in MATLAB to solve an ODE. This part was fine and the output is correct. It had to be plotted which was also no problem. The problem is the output is temperature versus time, and the final part wants the determination of a time constant from a known temperature. Is there any function that will determine this time from the graph or from the data solved in the ode solution. As so far nothing will work.