Change colors of arrows in quiver3

Question

Tala 2021-4-27

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/814845-change-colors-of-arrows-in-quiver3

编辑： Scott MacKenzie 2021-4-30

Hi,

I used quiver3 to plot some wind measurements at three different heights. I would like to change the color for the bottom, middle and top arrows to red, green and blue respectively. I would be grateful if you can help me with that.

I only used quiver3 beacuse I knew the function. Please suggest other functions if they would a better suite for this purpose.

quiver3(x3d,y3d,z3d,cell2mat([Vx_NB_B Vx_NB_M Vx_NB_T]),cell2mat([Vy_NB_B Vy_NB_M Vy_NB_T]),zeros(1,90))

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Scott MacKenzie 2021-4-27

在 MATLAB Online 中打开

How about this:

h1 = quiver3( . . . ); % code for top arrows
h1.Color = 'r'; % red arrows
hold on;
axis([0 80 0 200 0 9]);
h2 = quiver3( . . . ); % code for middle arrows
h2.Color = 'g'; % green arrows
h3 = quiver3( . . . ); % code for bottom arrows
h3.Color = 'b'; % blue arrows

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Answer 1

Scott MacKenzie 2021-4-30

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https://ww2.mathworks.cn/matlabcentral/answers/814845-change-colors-of-arrows-in-quiver3#answer_688520

编辑：Scott MacKenzie 2021-4-30

在 MATLAB Online 中打开

Faraz's primary concern is controlling the color in each stratum of the plot. I think this is close to the answer sought:

n = 500;
bottomStratum = [10 20];
middleStratum = [40 60];
topStratum = [80 90];
x = randi(100, 1, n);
y = randi(100, 1, n);
z1 = randi(bottomStratum, 1, n);
z2 = randi(middleStratum, 1, n);
z3 = randi(topStratum, 1, n);
u = x .* rand(1, n);
v = y .* rand(1, n);
w1 = z1 .* rand(1, n);
w2 = z2 .* rand(1, n);
w3 = z3 .* rand(1, n);
% bottom arrows
quiver3(x, y, z1, u, v, w1, 'color', 'r'); 
hold on;
axis([0 100 0 100 0 100]);
% middle arrows
quiver3(x, y, z2, u, v, w2, 'color', 'g'); 
% top arrows
quiver3(x, y, z3, u, v, w3, 'color', 'b');  

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Answer 2

Pratheek Punchathody 2021-4-30

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https://ww2.mathworks.cn/matlabcentral/answers/814845-change-colors-of-arrows-in-quiver3#answer_688425

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You can use the following code as reference for changing the color of the arrows using the "Color property in quiver3()" function.

load wind %loading the data
X = x(5:10,20:25,6:10);
Y = y(5:10,20:25,6:10);
Z = z(5:10,20:25,6:10);
U = u(5:10,20:25,6:10);
V = v(5:10,20:25,6:10);
W = w(5:10,20:25,6:10);
quiver3(X,Y,Z,U,V,W,'color','r'); %'color' Name-Value pair will help to change the color of the arrow
axis equal