# Variance, std where is now ? in 1.5.1 verision?

**URL:** https://discourse.julialang.org/t/variance-std-where-is-now-in-1-5-1-verision/46699
**Category:** General Usage
**Created:** [September 16, 2020, 12:38pm UTC](https://discourse.julialang.org/t/variance-std-where-is-now-in-1-5-1-verision/46699 "2020-09-16T12:38:26Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![programista](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/programista/32/5372_2.png) [@programista](https://discourse.julialang.org/u/programista)
#### Post date: [September 16, 2020, 12:38pm UTC](https://discourse.julialang.org/t/variance-std-where-is-now-in-1-5-1-verision/46699/1 "2020-09-16T12:38:26Z")

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Where in 1.5.1 versio is variance , std ?

```julia
 Version 1.5.1 (2020-08-25)

julia> a = rand(10)
10-element Array{Float64,1}:
 0.31820694853200404
 0.19056834277810242
 0.7491023037833544
 0.013571726580821286
 0.8919727769294576
 0.07944328102630704
 0.4813844063048547
 0.9577081770822704
 0.30967203586695313
 0.7091782785326979

julia> std(a)
ERROR: UndefVarError: std not defined
Stacktrace:
 [1] top-level scope at REPL[20]:1

julia> var(a)
ERROR: UndefVarError: var not defined
Stacktrace:
 [1] top-level scope at REPL[21]:1

julia> using StatsBase

julia> var(a)
ERROR: UndefVarError: var not defined
Stacktrace:
 [1] top-level scope at REPL[23]:1

```

Paul

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<div class="post-metadata">

### Author: ![lmiq](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lmiq/32/18314_2.png) [@lmiq](https://discourse.julialang.org/u/lmiq)
#### Post date: [September 16, 2020, 12:39pm UTC](https://discourse.julialang.org/t/variance-std-where-is-now-in-1-5-1-verision/46699/2 "2020-09-16T12:39:37Z")

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```julia
using Statistics
std(a)

```

---

<div class="post-metadata">

### Author: ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)
#### Post date: [September 16, 2020, 2:41pm UTC](https://discourse.julialang.org/t/variance-std-where-is-now-in-1-5-1-verision/46699/3 "2020-09-16T14:41:42Z")

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Something that can be helpful for this:

```julia
julia> apropos("standard deviation")
Random.randn!
Base.randn
Statistics.stdm
Statistics.std

```