How to plot multiple graphs using the 3 variable array values

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) 

[Rik]

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]

many graph in the same image! please!

Answer 1

[Steve Eddins]

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

[muhammad choudhry]

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]

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).