Hi, in fact Ive been reading an article, they are working with velocity and acceleration:
So a number of observations (vt; at) (speed between 5 and 25 and acceleration between -2,2)
They said:
If we normalize these observations by the number of observations that fall into that speed bucket we get a two-dimensional (discrete) distribution on the rectangle R = (5; 20]*[-2; 2].
And then They did a v-a heatmap
I did not get what they intend by that
So a number of observations (vt; at) (speed between 5 and 25 and acceleration between -2,2)
They said:
If we normalize these observations by the number of observations that fall into that speed bucket we get a two-dimensional (discrete) distribution on the rectangle R = (5; 20]*[-2; 2].
And then They did a v-a heatmap

I did not get what they intend by that