Problem 3005. Recursive Standard Deviation
When you have a large set of data, it can be resource consuming to calculate standard deviation at every step. So why not calculate a recursive std deviation at step n given:
- mean at step n
- value of added point at step n
- mean and std at step (n-1)
PS1: We'll always consider a vector of length 2 to which we add a third value
PS2: There are two common definitions of stdandard deviation. If you look at the help section of matlab, i used the second definition
Solution Stats
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers17
Suggested Problems
-
Remove any row in which a NaN appears
8549 Solvers
-
9865 Solvers
-
279 Solvers
-
construct matrix with identical rows
195 Solvers
-
Replace odd number in given matrix by zero
140 Solvers
More from this Author12
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!