# File eulers_method.ode
# Figure 2.7 Numerical Simulation by Euler's Method

# equation
a'=-a

 #initial condition
init a=1

# final time
@ total=2
# set the simulation method:
@ method=euler
# set the stepsize:
@ dt=0.33
# set the plotting window size:
@ xlo=0, xhi=2, ylo=0, yhi=1

# run the simulation in the GUI by selecting Initialconds|(G)o

# the other curves can be generated with stepsizes dt=0.67 or dt=0.01
# the stepsize can be changed in the GUI by selecting nUmerics|Dt

done