How to plot multiple graphs using the 3 variable array values

Question

muhammad choudhry 2020-10-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/618743-how-to-plot-multiple-graphs-using-the-3-variable-array-values

评论： Steve Eddins 2020-10-19

Hi, I am plotting the graph expressing depth over deflection graph: where as the depth increases deflection increases and the code is shown below. I want to add one more variable here length of the tank. lets say in array [0:0.2:3.4] and want to plot the depth over deflection graph when length is 00,0.2,0.4,......3.4.

How would I introduce the 3rd variable into the code below.

Code:

h = [0:0.008:0.600]
rho = 1000
g = 9.81
L = 3.4
F = rho*g*L*(0.5*(h).^2)
F1 = F/1000
E = 2.1E11
I = ((0.008)^4)/12;
Ymax = ((1/48)*((F1*(L^3))/(E*I)))*1000
L1 = [0:0.2:3.4]    %3rd variable
plot(Ymax,h) 

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Rik 2020-10-19

Do you want many graphs in the same image, or do you want a 3D point cloud? In the first case I would suggest using a loop, in the second case plot3.

muhammad choudhry 2020-10-19

many graph in the same image! please!

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Answer 1

Steve Eddins 2020-10-19

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/618743-how-to-plot-multiple-graphs-using-the-3-variable-array-values#answer_518028

在 MATLAB Online 中打开

Here is one way:

h = 0:0.008:0.600;
rho = 1000;
g = 9.81;
F = rho*g*L*(0.5*(h).^2);
F1 = F/1000;
E = 2.1E11;
I = ((0.008)^4)/12;
L1 = 0:0.2:3.4;
hold on
for L = L1
    Ymax = ((1/48)*((F1*(L^3))/(E*I)))*1000;
    plot(h,Ymax)
end
hold off

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muhammad choudhry 2020-10-19

Hi,

thanks alot! what is a best way of learning these sort of analysis as I need to generate graph after graph but when it comes to plot multiple data on one graph I am struggling. Would you recommend something which will help me learning it?I only be able to learn how to work with arrays and plotting simple graph but when it is coming to handling 3 variables and alot of data! I am struggling.

Regards,

M Choudhry

Steve Eddins 2020-10-19

The "Combine Multiple Plots" documentation page might be helpful to you. It illustrates several techniques, including the one that I used here (with the hold command).

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