Description Usage Arguments Details Value Author(s) References Examples

The andrews problem describes the motion of 7 rigid bodies connected by joints without friction

It is a non-stiff second order differential algebraic equation of index 3, consisting of 14 differential and 13 algebraic equations

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`yini ` |
the initial (state) values for the DE system. If |

`dyini ` |
the initial derivatives of the state variables of the DE system. |

`atol ` |
absolute error tolerance, either a scalar or a vector, one value for each y. |

`rtol ` |
relative error tolerance, either a scalar or a vector, one value for each y, |

`times ` |
time sequence for which output is wanted; the first
value of |

`parms ` |
list of parameters that overrule the default parameter values |

`printmescd ` |
if TRUE the mixed error significant digits computed using the reference solution at time 0.03 are printed |

`method ` |
the solver to use |

`maxsteps ` |
maximal number of steps per output interval taken by the solver |

`... ` |
additional arguments passed to the solver . |

The default parameters are: parameter <- c(m1 = .04325, m2 = .00365, m3 = .02373, m4 = .00706 , m5 = .07050, m6 = .00706, m7 = .05498 , xa = -.06934, ya = -.00227 , xb = -0.03635, yb = .03273 , xc = .014 , yc = .072, c0 = 4530 , i1 = 2.194e-6, i2 = 4.410e-7, i3 = 5.255e-6, i4 = 5.667e-7, i5 = 1.169e-5, i6 = 5.667e-7, i7 = 1.912e-5, d = 28e-3, da = 115e-4,e=2e-2, ea = 1421e-5, rr = 7e-3, ra = 92e-5, l0 = 7785e-5, ss = 35e-3, sa = 1874e-5, sb = 1043e-5, sc = 18e-3, sd = 2e-2, ta = 2308e-5, tb = 916e-5, u = 4e-2, ua = 1228e-5, ub = 449e-5, zf = 2e-2, zt = 4e-2,fa=1421e-5, mom = 33e-3)

A matrix of class `deSolve`

with up to as many rows as elements in
`times`

and as many
columns as elements in `yini`

, plus an additional column (the first)
for the time value.

There will be one row for each element in `times`

unless the
solver returns with an unrecoverable error. If
`yini`

has a names attribute, it will be used to label the columns
of the output value.

Karline Soetaert <[email protected]>

Francesca Mazzia <[email protected]>

http://www.dm.uniba.it/~testset

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