# Use of squeeze function
**URL:** https://discourse.julialang.org/t/use-of-squeeze-function/9500
**Category:** General Usage
**Created:** [March 5, 2018, 8:40am UTC](https://discourse.julialang.org/t/use-of-squeeze-function/9500 "2018-03-05T08:40:07Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Samudra](https://discourse.julialang.org/u/Samudra)
#### Post date: [March 5, 2018, 8:40am UTC](https://discourse.julialang.org/t/use-of-squeeze-function/9500/1 "2018-03-05T08:40:07Z")
Hi ,
I am trying to understand the way how squeeze function works,
when I tried to do the following it gives me the error " squeezed dims must all be size 1"
```julia
P = 0.1*ones(Float64, 4, 9)
for i=2:4
squeeze(P[i,:],1)
end
```
can somebody help me to figure this out?
---
### Author:  [@saschatimme](https://discourse.julialang.org/u/saschatimme)
#### Post date: [March 5, 2018, 8:43am UTC](https://discourse.julialang.org/t/use-of-squeeze-function/9500/2 "2018-03-05T08:43:19Z")
Does the documentation help you?
```julia
squeeze(A, dims)
Remove the dimensions specified by dims from array A. Elements of dims must
be unique and within the range 1:ndims(A). size(A,i) must equal 1 for all i
in dims.
Example
≡≡≡≡≡≡≡≡≡
julia> a = reshape(collect(1:4),(2,2,1,1))
2×2×1×1 Array{Int64,4}:
[:, :, 1, 1] =
1 3
2 4
julia> squeeze(a,3)
2×2×1 Array{Int64,3}:
[:, :, 1] =
1 3
2 4
```
In your case `P[i,:]` already returns a `Vector` what do you want to `squeeze` there?
---
### Author:  [@DNF](https://discourse.julialang.org/u/DNF)
#### Post date: [March 5, 2018, 2:05pm UTC](https://discourse.julialang.org/t/use-of-squeeze-function/9500/3 "2018-03-05T14:05:54Z")
Indexing like that already squeezes the array for you automatically.
```julia
julia> r = rand(2,3,2)
2×3×2 Array{Float64,3}:
[:, :, 1] =
0.292798 0.0481443 0.487387
0.563843 0.449423 0.586495
[:, :, 2] =
0.169698 0.794598 0.823726
0.587734 0.798384 0.0610884
julia> r[:, 2, :]
2×2 Array{Float64,2}:
0.0481443 0.794598
0.449423 0.798384
```
Squeezing again after that will therefore fail.
If you _don’t_ want it to squeeze, you have to index with a range:
```julia
julia> r[:,2:2,:]
2×1×2 Array{Float64,3}:
[:, :, 1] =
0.0481443
0.449423
[:, :, 2] =
0.794598
0.798384
```
---
### Author:  [@Samudra](https://discourse.julialang.org/u/Samudra)
#### Post date: [March 6, 2018, 6:33am UTC](https://discourse.julialang.org/t/use-of-squeeze-function/9500/4 "2018-03-06T06:33:43Z")
yeah now I get it, Thanks Guys, still a beginner to Julia 🙂