# Issue with data type in Arrays
**URL:** https://discourse.julialang.org/t/issue-with-data-type-in-arrays/34537
**Category:** New to Julia
**Created:** [February 12, 2020, 8:01pm UTC](https://discourse.julialang.org/t/issue-with-data-type-in-arrays/34537 "2020-02-12T20:01:51Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Nalt](https://discourse.julialang.org/u/Nalt)
#### Post date: [February 12, 2020, 8:01pm UTC](https://discourse.julialang.org/t/issue-with-data-type-in-arrays/34537/1 "2020-02-12T20:01:51Z")
I am new to Julia and have been recommended to post here for questions about my Julia related work.
Here is my code that attempts to create a stochastic SIR model: [https://paste.ofcode.org/riNhvYWMcaxUwP9PU6wKm6](https://paste.ofcode.org/riNhvYWMcaxUwP9PU6wKm6) but I get the following error:
> InexactError: Int64(18.45312925286407)
>
> Stacktrace:
> [1] Int64 at .\float.jl:709 [inlined]
> [2] convert at .\number.jl:7 [inlined]
> [3] push! at .\array.jl:868 [inlined]
> [4] stochasticSIR(::Array{Float64,1}, ::Array{Float64,1}, ::Int64) at .\In[18]:33
> [5] top-level scope at In[18]:51
This apparently means that a Float64 number is trying to be converted into an integer. I do not know where in my code that is done. How is this fixed and why is this happening?
---
### Author:  [@anon94023334](https://discourse.julialang.org/u/anon94023334)
#### Post date: [February 12, 2020, 8:09pm UTC](https://discourse.julialang.org/t/issue-with-data-type-in-arrays/34537/2 "2020-02-12T20:09:27Z")
The stack trace points to line 33:
```julia
push!(sirData.time, sirData.time[end] + k) # time step by k
```
and, indeed, you’ve initialized `sirData.time` to be `[0]` on line 17 which makes it a vector of ints. But `k` is a float (from the previous line).
What happens when you change that to
```julia
sirData = (dataₛ = [initialState[1]], dataᵢ = [initialState[2]], dataᵣ = [initialState[3]], time = [0.0])
```
?
Also, you don’t need semicolons as line / statement terminators.
Here’s a MWE:
```julia
julia> k = rand(Exponential(1/0.2))
3.1726199691536108
julia> a = [0]
1-element Array{Int64,1}:
0
julia> push!(a, k)
ERROR: InexactError: Int64(3.1726199691536108)
...
julia> a = [0.0]
1-element Array{Float64,1}:
0.0
julia> push!(a, k)
2-element Array{Float64,1}:
0.0
3.1726199691536108
```
---
### Author:  [@Nalt](https://discourse.julialang.org/u/Nalt)
#### Post date: [February 12, 2020, 8:50pm UTC](https://discourse.julialang.org/t/issue-with-data-type-in-arrays/34537/3 "2020-02-12T20:50:27Z")
@anon94023334 Thank you, that fixed that issue. I actually did not realize that the “33” on line [4] meant line 33 in the stochasticSIR function. I will note that for future debugging.
I have another question, but if I need to make a thread for it please just say so.
I wrote this code to be my interpretation of [Stochastic SIR model (discrete state, continuous time) in Julia - epirecipes](http://epirecip.es/epicookbook/chapters/sir-stochastic-discretestate-continuoustime/julia) but it is not doing what I thought it would do since when I examine each array in the sirOutput tuple they do not have matching lengths nor does the data they contain make sense. At this point the issue is a fundamental problem with how my code operates and I do not know what flaw in my architecture is. Do you?
---
### Author:  [@non-Jedi](https://discourse.julialang.org/u/non-Jedi)
#### Post date: [February 12, 2020, 9:02pm UTC](https://discourse.julialang.org/t/issue-with-data-type-in-arrays/34537/4 "2020-02-12T21:02:14Z")
Your example code is relatively small. Have you tried stepping through it with [Debugger.jl](https://github.com/JuliaDebug/Debugger.jl) to find the point where it’s execution diverges from your expectation?
---
### Author:  [@anon94023334](https://discourse.julialang.org/u/anon94023334)
#### Post date: [February 12, 2020, 9:17pm UTC](https://discourse.julialang.org/t/issue-with-data-type-in-arrays/34537/5 "2020-02-12T21:17:44Z")
This is getting to be more complex than I have time for, but
```julia
if randNum < (probᵢ / probₜ)
push!(sirData.dataₛ, sirData.dataₛ[end] - 1);
push!(sirData.dataᵢ, sirData.dataᵢ[end] + 1);
else
push!(sirData.dataᵢ, sirData.dataᵢ[end] - 1);
push!(sirData.dataᵣ, sirData.dataᵣ[end] +1)
end
```
pretty much guarantees that the `data\_x` arrays will be of different lengths: you’re pushing to `data\i` in both cases, but only pushing to the others conditionally.