Add fixes

[pilinux]

• display.set_matplotlib_formats('svg') is deprecated since IPython 7.23
• modelparams[i,1] = grad

previous code:

from IPython import display
display.set_matplotlib_formats('svg')

modelparams[i,0] = grad

modified code:

from matplotlib_inline.backend_inline import set_matplotlib_formats
set_matplotlib_formats('svg')

modelparams[i,1] = grad

[mikexcohen]

Thanks for catching that indexing bug. It was one I accidentally introduced after it being correct in the video :\

The svg issue is trickier, because the current version works in colab without requiring any additional installations. Visualization is annoyingly IDE-specific in Python and there are never solutions that work for everyone.