3D Plotting Broken

[jordan-gleeson]

Describe the bug
Plotting in 3D space appears to be broken. The example in visualization.ipynb returns an empty 2D plot.

To Reproduce
Open visualization.ipynb and run all code, then view plot1.gif.

Expected behavior
A 3D visualization of the sphere optimization example.

Environment (please complete the following information):

• OS: Google Colab
• PySwarms Version: 1.2.0
• Python Version: 3.10.12

[100jnle]

Hi,

I am not a developer, so this is a crude work-around, but in the plotters utility function, plot_surface in plotters.py, I was able to get an animation by editing the lines that initialize the figure.

I changed

pyswarms/pyswarms/utils/plotters/plotters.py

Lines 343 to 349 in 70c969d

	if canvas is None:
	fig, ax = plt.subplots(1, 1, figsize=designer.figsize)
	else:
	fig, ax = canvas
	# Initialize 3D-axis
	ax = Axes3D(fig)

to

 if canvas is None:
        fig, ax = plt.subplots(1, 1, figsize=designer.figsize, subplot_kw={"projection":"3d"})
    else:
        fig, ax = canvas

    # Initialize 3D-axis
    # ax = Axes3D(fig)

and it worked, though the plot is a bit uglier.

sphere_swarm.mp4