I noticed that imshow or pcolor* do not have an option to add annotations to each box.
Currently, MPL creates heatmaps such as the one below:

However, MPL does not have the ability to add values to each grid box such as the image below:

This seems like a standard feature, which can enhance the readability of these heatmaps. In addition, this can be very helpful when values are 0.01 apart. It can help the user distinguish the heatmap values more efficiently. A proposed solution to turn on these values would look like plt.pcolor(data, showvalues=true).

Shouldn't this be included?