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NDSolve::coexp NDSolveValue::coexp ParametricNDSolve::coexp ParametricNDSolveValue::coexp

NDSolve::coexp NDSolveValue::coexp ParametricNDSolve::coexp ParametricNDSolveValue::coexp

Details

  • This message is generated when grid points are specified both directly in an explicit list and indirectly with values for the indicated options.
  • Off[message] switches off the message; On[message] switches it on. For example: Off[NDSolve::coexp].

Examples

Basic Examples  (1)

A warning message is generated because the grid points are specified both by the value of the "Coordinates" option and through the MinPoints option:

Wolfram Language code: NDSolve[{D[u[x, t], t] == D[u[x, t], x, x], u[x, 0] == Exp[-100 x ^ 2], u[-1, t] == u[1, t]}, u, {x, -1, 1}, {t, 2}, Method -> {"MethodOfLines", "SpatialDiscretization" -> {"TensorProductGrid", "Coordinates" -> Join[Sin[Pi Range[0, 200] / 400] - 1, 1 - Sin[Pi Range[199, 0, -1] / 400]], "MinPoints" -> 4}}]

This shows a correct input:

Wolfram Language code: NDSolve[{D[u[x, t], t] == D[u[x, t], x, x], u[x, 0] == Exp[-100 x ^ 2], u[-1, t] == u[1, t]}, u, {x, -1, 1}, {t, 2}, Method -> {"MethodOfLines", "SpatialDiscretization" -> {"TensorProductGrid", "Coordinates" -> Join[Sin[Pi Range[0, 200] / 400] - 1, 1 - Sin[Pi Range[199, 0, -1] / 400]] }}]