How to create a 3D plot from 2D set of data .

%I have a data set 

x1 =[ 0 0.12780 0.2145 0.2761 0.3211 0.354 0.379 0.396 0.409 0.417 0.421 0.421 0.417 0.412 0.406 0.394];
x2 = [0 0.025 0.050 0.075 0.100 0.125 0.150 0.175 0.200 0.225 0.250 0.275 0.300 0.325 0.350 0.375];
y=[31.117 37.28 43.13 48.67 53.90 58.840 63.450 67.740 71.740 75.390 78.720 81.680 84.240 86.090 87.230 87.880 ];
% if I plot normally 
plot(x1,y); hold on 
plot(x2,y);hold off
% attach is the picture
% but how can I plot 3D using this data?

[Azzi Abdelmalek]

Precise x, y and z coordinates

[Walter Roberson]

So that we can understand what you are trying to do:

For the first line, please indicate what the x, y, and z coordinates should be for the first two points.

For the second line, please indicate what the x, y, and z coordinates should be for the first two points.

Answer 1

[Roger Stafford]

Assuming that when you say "3D" you mean that x1 and x2 are along axes in different dimensions, then do:

 plot3(x1,x2,y)

If by any chance you mean that the two curves are to be plotted as a single continuous curve, then do:

 p = length(y):-1:1;
 plot([x1,x2(p)],[y,y(p)],'y-')

[Nasir Qazi]

 % with plot3(x1,x2,y)I come up with the following result , though I am looking for two line but it only one line.

% Secondly I am seeking for something like a surface plot.  but I don't really know how can I do that .

Answer 2

[Faisal Khan]

why not try hold on command to get both the curves on the same figure