# Bug? Using Flux & getting Float32 response on 64 bit Ubuntu OS
**URL:** https://discourse.julialang.org/t/bug-using-flux-getting-float32-response-on-64-bit-ubuntu-os/21440
**Category:** Machine Learning
**Created:** [March 4, 2019, 4:06am UTC](https://discourse.julialang.org/t/bug-using-flux-getting-float32-response-on-64-bit-ubuntu-os/21440 "2019-03-04T04:06:34Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@samq](https://discourse.julialang.org/u/samq)
#### Post date: [March 4, 2019, 4:06am UTC](https://discourse.julialang.org/t/bug-using-flux-getting-float32-response-on-64-bit-ubuntu-os/21440/1 "2019-03-04T04:06:34Z")
Julia version 1.1.0
Ubuntu 16.04 64 bit
Flux version (?) please tell me how to see the version of Flux
I get Float32 responses instead of Float64 when doing the following:
using Flux
model = Flux.Dense(2, 1, σ)
model.W
(response in Jupyter Lab notebook:
Tracked 1×2 Array{Float32,2}:
0.604352 -1.12679)
model.b
(response in Jupyter Lab notebook:
Tracked 1-element Array{Float32,1}:
0.0f0)
The responses should be Float64 instead of Float32.
How do I fix this?
If this is a bug, how do I submit an issue?
---
### Author:  [@GunnarFarneback](https://discourse.julialang.org/u/GunnarFarneback)
#### Post date: [March 4, 2019, 6:37am UTC](https://discourse.julialang.org/t/bug-using-flux-getting-float32-response-on-64-bit-ubuntu-os/21440/2 "2019-03-04T06:37:25Z")
> [@samq](#):
>
> The responses should be Float64 instead of Float32.
Any particular reason you expect to get double precision (i.e. `Float64`) instead of single precision floating point numbers? `Float32` is sufficient precision for typical artificial neural networks and allows faster computation on CPU as well as drastically better performance on most GPUs. Note that the fact that you have a 64 bit processor or operating system has no consequence for the choice between single and double precision floating point numbers.
---
### Author:  [@mcabbott](https://discourse.julialang.org/u/mcabbott)
#### Post date: [March 4, 2019, 12:48pm UTC](https://discourse.julialang.org/t/bug-using-flux-getting-float32-response-on-64-bit-ubuntu-os/21440/3 "2019-03-04T12:48:17Z")
The default is Float32 but there are functions to change this, from here: [Numeric precision utilities by MikeInnes · Pull Request #572 · FluxML/Flux.jl · GitHub](https://github.com/FluxML/Flux.jl/pull/572/files)
```julia
julia> Dense(3,2).W
Tracked 2×3 Array{Float32,2}:
-0.308033 0.610357 -0.757685
0.0664493 0.409627 -0.880773
julia> Dense(3,2) |> f64
Dense(3, 2)
julia> ans.W
Tracked 2×3 Array{Float64,2}:
-0.871606 -0.773181 0.666745
0.328294 0.34714 0.577119
```
---
### Author:  [@samq](https://discourse.julialang.org/u/samq)
#### Post date: [March 4, 2019, 6:41pm UTC](https://discourse.julialang.org/t/bug-using-flux-getting-float32-response-on-64-bit-ubuntu-os/21440/4 "2019-03-04T18:41:44Z")
Ok! Thank you for clearing up my misunderstanding!
---
### Author:  [@samq](https://discourse.julialang.org/u/samq)
#### Post date: [March 4, 2019, 6:53pm UTC](https://discourse.julialang.org/t/bug-using-flux-getting-float32-response-on-64-bit-ubuntu-os/21440/5 "2019-03-04T18:53:25Z")
Thank you!