Colored plot of a parameter with coordinates not homogeneous

Goodmorning,

I have a txt file as follow:

X Y Parameter

1.1 0.5 324

1.2 0.7 4222

1.5 1.1 425

2 1.11 5

My file is bigger, but it's just an example. I would like to rapresent in a X,Y plot the value of "Parameter" with a colored scale. Since the interval between coordinates is not constant I don't know how to rapresent it. Can anyone help me?

Thank you!

Answer 1

[Jonas Allgeier]

You can use textscan(), readtable() or importdata() to read the values into the workspace.

For plotting in different colors, scatter() would make sense.

[Vittorio]

Thank you, but my problem is not import data, but how to build a plot since I don't have a matrix of values but a vector, where any value has two coordinate associated

[Jonas Allgeier]

Alright. For plotting scattered datapoints with different colors, you can use scatter(). See the following example.

scatter(rand(10,1),1:10,[],1:10,'filled')

If you want to fill the space in between the scattered points, you would need to perform some kind of interpolation.

[Vittorio]

"If you want to fill the space in between the scattered points, you would need to perform some kind of interpolation."

Yes, this is exactly what I need. Sorry I didn't explain it properly.

[Jonas Allgeier]

Then see this page for various 2D interpolation techniques.

[Vittorio]

Thank you!