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This is the analog of initn.m for a 2 by 2 system. You enter two functions ` eulerfcn1` and ` eulerfcn2` for the right hand sides of the Euler iteration
for your two equations. ` h` is the step
size, ` t0`, ` tf`, ` x0`, and ` y0` are
the starting time, final time and initial conditions.

*Michael Renardy*

*2000-05-12*