MATLAB: Converting tabulated data to 3D plot

surface 3d plot by tabulated data

Hi,

I have the attached table. I would be grateful if you can tell me how to show it in 3D ( Red–> x ; Green–> Y & White cells–>Z)

Thanks, Ehsan

Hi,

define a vector x

x = [0 10 30 60 120 -10];

define a vector y

y = 1000:1000:7000;

and calculate/write your z values in a matrix z = [size(y), size(x)].

In this example i use random integers:

z = randi(100,length(y),length(x));

Then use the surf function:

surf(x,y,z)

to get a 3D surface plot from your data.

Note that this procedure sorts your vector x in ascending order. if you want to avoid this, use:

surf(z)

and change the values that are used for the labeling of the axes by using your values from x and y.

Best regards

Stephan

The [G] value appears to be the third value (row) in the ‘f’ vector, and so is the third column in ‘y’.

To plot it, try this:

figure
plot(t, y(:,3))
grid

If that gives you the result you want, then you know that ‘y(:,3)’ is [G].

[X,Y] = meshgrid(1:50,1:50);
Z=3*ones(length(Y),length(X));
surf(X,Y,Z);

Best wishes

Torsten.