This PR enhanced multiple plots in the jupyter notebook, including the way of computing statistics, figure titles, color schemes, range of color bars, and so on.
Changed the figure title in plot 2.4
Replaced the normalized firing rate to original firing rate for visualization in plot 3.2
Removed the normalization and limit of the color bar in plot 3.2
Changed the color scheme used in plot 3.3
Removed the normalization and limit of the color bar in plot 3.3
Added annotation texts of X for the cells of population 4E and 4I of area TH
This PR enhanced multiple plots in the jupyter notebook, including the way of computing statistics, figure titles, color schemes, range of color bars, and so on.