Realize a 3d line plot

Hi all

i need to realize a 3d plot for displaying 3 connected quantities.

for i=1:length(i_ed)   
    for j=1:length(x)
    if K1(i,j)>0
   psl(i,j)=(70*(W_end_t(i)/Sr(i))*K1(i,j)*K2(i)*K3*acg(i))*1000;%N/m^2 RES22 (61)
    end
    end
end
plot3(L_end,x,psl)
xlabel('L')
ylabel('x')
zlabel('Psl')
hold on

where L_end has length(i_ed) elements. For better understanding the problem, x/L_end varies between very small values to 1. My goal it is to graph in the same 3d plot many curves as L_end length.

Thank you for the help!

Answer 1

[Cris LaPierre]

You must be getting an error message. What does it say (all the red text)?

Check that your inputs are what plot3 expects.

plot3(X,Y,Z) plots coordinates in 3-D space.

• To plot a set of coordinates connected by line segments, specify X, Y, and Z as vectors of the same length.
• To plot multiple sets of coordinates on the same set of axes, specify at least one of X, Y, or Z as a matrix and the others as vectors.

In your case, it appears X and Y are vectors. Are they the same length?

Z appears to be a matrix. Do the number of rows match the lengths of X and Y?

[EldaEbrithil]

Hi Cris thank you for the help

"What does it say (all the red text)?"

Vectors must be the same length.

"Are they the same length?"

*x is 1x76800 double, y is 1x14 double, z is 76800x14 double*

Is it possible to plot z(x,y) even if x and y have different lengths?

[Cris LaPierre]

No, it is not possible to plot vectors of different length.

They need to be the same length because they create a coordinate for each point.

There may be a different solution, but I'd need to know more about the data. Could you explain what values of X, Y and Z should be use to plot the 15th row of Z?

[EldaEbrithil]

ok i see, let's try in this way... now suppose to have an y with this dimension 76800x14 double and x 76800x14 double.

This is Y:

This is X:

This is Z:

[Cris LaPierre]

Try to plot it. What happens? How does that compare to what you want?

[EldaEbrithil]

Ok it works!!

thank you very much!!