Mesgrid of time dependent coordinates

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Vladimir 2020-10-1

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https://ww2.mathworks.cn/matlabcentral/answers/603337-mesgrid-of-time-dependent-coordinates

评论： Star Strider 2020-10-1

I am trying to use a mesgrid operation to define a series of time-depedent grids.Currently, I am using a "for" loop, but I would like to vectorize this operation

For example,

for tt=1:1000

x(tt)=100*cos(tt)

y(tt)=100*sin(tt)

[X, Y] = meshgrid[x(tt)-2:x(tt)+2, y(tt)-2:y(tt)+2]

end

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Answer 1

Star Strider 2020-10-1

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在 MATLAB Online 中打开

I am not certain what you want to do.

Experiment with this:

tt = linspace(-pi, pi, 50);
x = 100*cos(tt);
y = 100*sin(tt);
[X,Y] = meshgrid(x, y);

.

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Vladimir 2020-10-1

Sorry, my bad for confusion, I should not have picked cos and sin .

In general, I have a time dependent trajectory of (x,y) coordinates that may be more complicated than just sinusoidal motion.

At every time step of this trajectory I want to re-create a meshgrid and re-compute some function F (X,Y)

Star Strider 2020-10-1

I am not certain what you want to do, however that should be relatively straightforward. Choose the functions you want, and calculate them as I did, then calculate with the new mesh (likely in a loop) and store the results.

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