MATLAB: I am trying to simulate Brownian motion where the initial position of the particles are generated by random number generators. I need to freeze the particles when it reaches a particular position, how can i do it? kindly help

brownian motionparticles

I am trying to simulate Brownian motion where the initial position of the particles are generated by random number generators. I need to freeze the particles when it reaches a particular position, how can i do it? kindly help

Best Answer

How not? Just stop updating those particles once you have detected they have reached the position.

You might want to do something like create a logical vector StillActive, initialized to all true. When the particle is in position, mark it false. Only do calculations on entries that are still true.

Positions(StillActive) = Positions(StillActive) + randn(sum(StillActive),1);

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MATLAB: I am trying to simulate a biased 2d random walk in a 100 x 100 unit domain and I can’t get the particles to walk one at a time and stick once they have either reached the bottom row or an occupied square.

I'm pretty sure that one of my attached random walk simulations does something like that - quit when it reaches some boundary. Try them.

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MATLAB: K-means Clustering Result Always Changes

MATLAB: I am trying to simulate a biased 2d random walk in a 100 x 100 unit domain and I can’t get the particles to walk one at a time and stick once they have either reached the bottom row or an occupied square.

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