Histogram distribution
Among them, the horizontal axis represents the value, and the vertical axis represents the quantity. Each slice shows a histogram, and the slices are arranged by steps (step number or time); the old slices are darker, and the new slices are lighter in color. As shown in the figure, it can be seen that at step 393, there are 161 elements in the bin centered at 4.91.
In addition, the histogram slices are not always uniformly distributed according to the number of steps or time, but a subset of all histograms is extracted by reservoir sampling to save memory.
https://blog.csdn.net/akadiao/article/details/79551180
https://blog.csdn.net/yllgl1/article/details/114089859
https://blog.csdn.net/wgj99991111/article/details/ 84708255