Pcolor Plot for 50,000 values

2021 11 25
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更新时间：2021 11 30
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Let me try to put it this way:
I have 50,000 particles in a 2-D box. After I do my simulation, I get that some of the particles swirl around each other and kind of form a vortex type structure.
So now I have 50,000 x-cordinate(x), y-cordinate(y) and 50,000 value of x-velocity(vx) and y-velocity(vy).
What I want is to plot this data in such a way that it should show the vortex with arrows representing the direction of velocity.
Also it should have a colorbar.
One of my friend said that it can be plotted using pcolor and the arrows can be shown using quiver plot.
I need high quality image
Can anyone help, thank you!

6 个评论
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Image Analyst
Image Analyst 2021-11-25
Probably but you forgot to attach your data so no one can try anything for you.
Alakesh Upadhyaya
Alakesh Upadhyaya 2021-11-29
The data is too big but here I will attach a mat.file, the 3rd and 4th coulumn are x and y positions and 5th and 6th coloumn are x and y component of velocity.
KSSV
KSSV 2021-11-29
编辑：KSSV 2021-11-29
Unable to load the file.
Have a look on this file exchange function: https://in.mathworks.com/matlabcentral/fileexchange/3225-quiverc
Alakesh Upadhyaya
Alakesh Upadhyaya 2021-11-30
编辑：Alakesh Upadhyaya 2021-11-30
let's just say I ahve 50000 partcles in a 100 x 100 box,
box=100;
x=box*randn(50000,1); x-positions
y=box*randn(50000,1); y-positions
vx=randn(50000,1); x-velocity
vy=randn(50000,1); y-velocity
how do I pcolor plot these with arrows showing the direction of the particles
Walter Roberson
Walter Roberson 2021-11-30
The file turns out to be a text file that has been named with the .mat extension.

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