How can I add arrows onto the particles in my movie that indicate there movement with my code and how can I calculate the square displacement of each particle.

Question

BAILEY MCMASTER 2023-5-2

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1956849-how-can-i-add-arrows-onto-the-particles-in-my-movie-that-indicate-there-movement-with-my-code-and-ho

评论： Walter Roberson 2023-5-2

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

N=10; % number of integrins

L=100; % size of the domain 100nm

D=.01; % diffusion coefficient

dt=1; % time step

F=randi([1, 10],1); % force on the bond with a random number of 1 to 10

P_a=randi([0,1],1); % binding rate of a random number from 0 to 1

P_ub=1/(1.5*F); % unbinding rate based upon our previous values

Tmax=500; % max time

% Intialize our integrins

x=randi([0,360],N,1); % x-coordinates generated randomily for each integrin

y=randi([0,50],N,1); % y-coordinates generated for each

state=ones(N,1); % Each integrin is set to an inactive state at 0

% our figure

figure;

axis([0 L 0 L]);

set(gca,'nextplot','replacechildren');

% position update

for t = 0:dt:Tmax

% colors for our integrin states

colors = repmat([1 0 0], N,1); % red for inactive state

colors(state == 2,:,:) = repmat([0 1 0],sum(state == 2),1);

% plotting our integrins

scatter(x,y,50,colors,'filled');

title(sprintf('Time=%.2f',t));

drawnow;

for i=1:N

w=randi([0,1],1);

if state(i)==1

dx=randi([-360,360],1);

dy=randi([-50,50],1);

x(i)=x(i)+dx;

y(i)=y(i)+dy;

end

x=mod(x,L);

y=mod(y,L);

for i=1:N

w_1=randi([0,1],1);

if w_1 < P_a && state(i)==1

state(i)=2;

end

for i=1:N

w1=randi([0,1],1);

if state(i)==2 && w1<P_ub

state(i)=1;

end

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Walter Roberson 2023-5-2

what is the difference between this and https://www.mathworks.com/matlabcentral/answers/1956874-how-can-i-add-arrows-to-each-integrin-particle-in-my-plot-that-is-moving?s_tid=srchtitle

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Answer 1

Walter Roberson 2023-5-2

在 MATLAB Online 中打开

sqrt(mean(x.^2))

You can add arrows using quiver() or annotation()

However given the color requirements you can tell they expect you to use scatter plots of current and previous positions with different colors for different states.