NDIFFQ

a package residing on the SHARE directory for numerical solutions of differential equations. LOAD("NDIFFQ"); will load it in for use. An example of its use would be:

Define_Variable(N,0.3,FLOAT);
Define_Variable(H,0.175,FLOAT);
F(X,E):=(Mode_Declare([X,E],FLOAT),N*EXP(X)/(E+X^(2*H)*EXP(H*X)));
Compile(F);
Array([X,E],FLOAT,35);
Init_Float_Array(X,1.0E-3,6.85); /* Fills X with the interval */
E[0]:5.0;                        /* Initial condition */
Runge_Kutta(F,X,E);              /* Solve it */
Graph2(X,E);                     /* Graph the solution */

p.s. Runge_Kutta(F,X,E,E_Prime) would be the call for a second-order equation.

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