Plotting the Solution
A plot of the solution given by DSolve can give useful information about the nature of the solution, for instance, whether it is oscillatory in nature. It can also serve as a means of solution verification if the shape of the graph is known from theory or from plotting the vector field associated with the differential equation. A few examples that use different Mathematica graphics functions follow.
Here is the general solution to a linear first-order equation.
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The solution can be plotted for specific values of the constant
C[1] using
Plot. The use of
Evaluate reduces the time taken by
Plot and can also help in cases where the solution has discontinuities.
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Here is the plot for a linear second-order ODE with initial values prescribed at 0.
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This nonlinear equation has two solutions that can be plotted on the same graph.
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The solution to this Abel ODE is given in implicit form.
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A contour plot can be used to study the nature of the solution. Each contour line corresponds to a solution to the ODE for a fixed value of
C[1].
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Here is the plot of the solutions to a system of two linear ODEs. The
WorkingPrecision option in
Plot is required because the solution is fairly complicated.
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The
ParametricPlot function can be used to trace the solution curve
in the plane.
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Here is the plot for the solution to a DAE.
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Here is the general solution to a linear PDE.
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Here is a plot of the solution surface for a particular choice of the arbitrary function
C[1].
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