How can I integrate discrete data without an analytical function?

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SUMMARY

This discussion focuses on integrating discrete velocity data on a grid without an analytical function. The user seeks to determine future positions in space using numerical integration methods, specifically mentioning the Runge-Kutta method. The solution involves summing function values at discrete points by selecting appropriate distances between the given x and y values, rather than relying on fixed steps. This approach allows for effective integration of discrete data.

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  • Understanding of discrete data representation
  • Familiarity with numerical integration methods, specifically Runge-Kutta
  • Knowledge of grid-based data structures
  • Basic principles of velocity and motion in physics
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Researchers, physicists, and engineers working with discrete data in simulations, particularly those focused on motion and velocity analysis.

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I have a grid and on each point on the grid I have discrete velocity data. I however don't have anyalytical function. I need to integrate the points and check where in space they will be after some time. I know it very easy to do it with runge-kutta if i have the analytical function for velocity but how can i do it just using the discrete data??
 

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"Runge-Kutta", or any numerical integration method, sums values of f at discrete points: f(x+ nh, y+ mk), for example. Just use the given function values, choosing \Delta x, \Delta y as the distances between the given x and y values rather than a fixed step like "x+ nh" or "y+ mk".
 
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