(48G 49G 50G) RungeKutta Diff Eqn solver

06112021, 11:23 PM
Post: #12




RE: 48G50G RungeKutta Diff Eqn solver
Thank you again, Werner. More thoughts on your responses:
"Having never used the differential equation solver in the 49/50, I had to look up how to use it. Given Y' = F(X,Y), with X the independent and Y the dependent variable, it expects an equation or a program to return the value of Y', "Instead of an equation for F, the calculator also accepts a program, "It helps if you know that equations are really stored as programs. Equations are stored as programs? How or where did you learn that a procedure could be substituted for the RHS of the DE? Was this characteristic also in the 48G and 49G firmware? Interesting that the issue was never raised back then. Or, I suppose it would have been addressed in succeeding User Guides/References The workaround or its need does not seem consistent with a straightforward RungeKutta formulation. Somewhat troubling. 

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