Data Visualization from Dat file
thanks for reaching out!
If you'd like to visualize your data using a heatmap, you could use a seaborn heatmap. Seaborn works on top of matplotlib and takes care of some details, you'd have to handle manually in matplotlib.
So, if you're use pandas for your data, you can compute the correlation with corr() and then plot the results using a sns.heatmap()