Graph in 3D Matlab

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Magdalin 2017-2-18

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https://ww2.mathworks.cn/matlabcentral/answers/325758-graph-in-3d-matlab

评论： Image Analyst 2017-2-19

I would like to present a Brownian motion figure (t, W (t)) in dimension 3, so as to have the x and y axes representing the time t and the z axis representing the brownian motion W (t). Here is the code I used in dimension 2 :

tf=350; % Set time interval [0,tf]

N=350; % Set number of steps to compute at in [0,tf]

h=tf/N; % Compute the time step

dW=sqrt(h)*randn(1,N); % Generate array of brownian movements

W=cumsum(dW); % Sum the array cummulativley

t=0:h:tf; % Array of equal time steps

plot(W); % Plot the Wiener process

xlabel('t');ylabel('W(t)');title('Sample Wiener Process')

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Magdalin 2017-2-19

编辑：Image Analyst 2017-2-19

I know that this is a 2-dimension plot, but I just want to know how I can change my code to have a 3D view of this 2D plot just like this:

https://www.google.com/search?q=3d+view+of+2d+plot+matlab&client=firefox-b&biw=1366&bih=657&site=webhp&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiZ9uSis5zSAhVLtBoKHZJPDTYQ_AUIBigB#imgrc=_WV7N4T7xBbHvM:

Image Analyst 2017-2-19

I gave you random walk code below. The thing we're all confused about is how you have two axes (x and y) for time ("have the x and y axes representing the time t ") while the particle travels in only one direction - the z direction. Explain why there are two time axes.

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