Creating surface plot from 3 coloum Matrix?

Good day together,

I would like to know if it is possible to create a surface plot using matlab from a 3 coloum matrix with different X and Y values. To be a bit more clear here is an example of how the data would look:

X Y Z

2000 20 rand

2000 40 rand

2000 60 rand

2500 30 rand

2500 50 rand

2500 70 rand

3000 20 rand

3000 60 rand

I found an answer here: https://de.mathworks.com/matlabcentral/answers/412639-creating-surface-plot-from-a-matrix-with-3-columns but this seems to only work when you always have the same Y values for each X step or at least the same amount of Y for each X value.

Answer 1

[Niklas Federkeil]

I solved the issue by creating a matrix with all the unique x and y values filling this with the corresponding z value and then filling the empty spaces with NaN. This way I am able to use the contourf for plotting.

from example

2000 2500 3000

20 rand NaN rand

30 NaN rand NaN

40 rand NaN NaN

50 NaN rand NaN

60 rand NaN rand

70 NaN rand NaN