# OnlineStats at Series how to get numer of case? s.n , n(s) not works
**URL:** https://discourse.julialang.org/t/onlinestats-at-series-how-to-get-numer-of-case-s-n-n-s-not-works/34913
**Category:** General Usage
**Created:** [February 20, 2020, 4:29pm UTC](https://discourse.julialang.org/t/onlinestats-at-series-how-to-get-numer-of-case-s-n-n-s-not-works/34913 "2020-02-20T16:29:20Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@programista](https://discourse.julialang.org/u/programista)
#### Post date: [February 20, 2020, 4:29pm UTC](https://discourse.julialang.org/t/onlinestats-at-series-how-to-get-numer-of-case-s-n-n-s-not-works/34913/1 "2020-02-20T16:29:21Z")
using OnlineStats, Distributed
julia\> s = @distributed merge for i in 1:3
fit!(Series(Mean()), randn(10\_000))
end
Series
└── Mean: n=30000 | value=0.0018463
julia\> s.stats
(Mean: n=30000 | value=0.00170161,)
julia\> value(s)
(0.0017016120916806031,)
julia\> n(s)
```julia
ERROR: UndefVarError: n not defined
Stacktrace:
[1] top-level scope at none:0
julia> s.n
ERROR: type Series has no field n
Stacktrace:
[1] getproperty(::Any, ::Symbol) at .\sysimg.jl:18
```
Paul
---
### Author:  [@nilshg](https://discourse.julialang.org/u/nilshg)
#### Post date: [February 20, 2020, 4:40pm UTC](https://discourse.julialang.org/t/onlinestats-at-series-how-to-get-numer-of-case-s-n-n-s-not-works/34913/2 "2020-02-20T16:40:06Z")
```julia
s.stats[1].n
```
(you can work this out by doing `fieldnames(typeof(s.stats))` and then `fieldnames(typeof(s.stats[1]))` once you’ve found out that the field of `s.stats` is called `1`)
---
### Author:  [@joshday](https://discourse.julialang.org/u/joshday)
#### Post date: [February 20, 2020, 4:45pm UTC](https://discourse.julialang.org/t/onlinestats-at-series-how-to-get-numer-of-case-s-n-n-s-not-works/34913/3 "2020-02-20T16:45:15Z")
You can use `nobs(s)`.