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Once the data from ` initn.m` has been
entered and initialized, typing ` rk4plot` will create a graph
of each 4th order Runge-Kutta approximation associated with a step
size from ` hvec`. All are plotted on the same axis on top of the
slope field. (Note: We will not derive the iteration scheme for
Runge-Kutta methods, so there is no analog to ` eulerfcn` in
` initn.m`. However you must have some string entered for
` eulerfcn` so the variable is defined.) As for eulplot.m, the command window shows the computed numbers.

*Michael Renardy*

*2000-05-12*