Exponentially Weighted Moving Average
![EWMA for 3 values of beta](/assets/img/wiki/Ewma-andrew-ng.jpg)
Vt* = *β* * *Vt − 1 + (1 − β)θt*; *θt − currentdatapoin**t
We usually average of $\frac{1}{1-\beta}$ datapoints; for β = 0.9 we average over 10 datapoints
Vt* = *β* * *Vt − 1 + (1 − β)θt*; *θt − currentdatapoin**t
We usually average of $\frac{1}{1-\beta}$ datapoints; for β = 0.9 we average over 10 datapoints