<s>[INST] I'm working on a personal project involving data analysis, and I'm trying to visualize some data on a 3D scatter plot. I've been provided with the coordinates of each data point (x, y, z), but I've realized that my data points have different weights or magnitudes, which I want to visualize as well.

I'm using Matplotlib as my plotting library. How can I modify the size of each marker in the 3D scatter plot to represent the weights or magnitudes of the data points?[/INST]