# Question about HHT Pkg

**URL:** <https://discourse.julialang.org/t/question-about-hht-pkg/44477>\
**Category:** General Usage\
**Tags:** question, package\
**Created:** [August 7, 2020, 7:45am UTC](https://discourse.julialang.org/t/question-about-hht-pkg/44477 "2020-08-07T07:45:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![abcde](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/abcde/32/16180_2.png) [@abcde](https://discourse.julialang.org/u/abcde)\
**Post date:** [August 7, 2020, 7:45am UTC](https://discourse.julialang.org/t/question-about-hht-pkg/44477/1 "2020-08-07T07:45:20Z")

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```julia
using EmpiricalModeDecomposition
a=convert(Vector{Float64},rand(20))
s=EmpiricalModeDecomposition.EEMDSetting(2,2,2,2,2,10.0)
w=EmpiricalModeDecomposition.eemd(a,s)
EMD_heping_1MX_V_35kV1=EmpiricalModeDecomposition.hht(a,s)

```

I’m is to use EmpiricalModeDecomposition jl, according to the code in the document([Docstrings · EmpiricalModeDecomposition.jl](https://juliahub.com/docs/EmpiricalModeDecomposition/c9SYr/0.1.1/autodocs/)) for writing, but it was an error:  
ERROR: LoadError: UndefVarError: input not defined

 ![image](https://global.discourse-cdn.com/julialang/original/3X/4/c/4cdb8b73ae76b24b6afbeb7575cfcbbb309bf00b.png)  
why??thanks!

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<div class="post-metadata">

**Author:** ![abcde](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/abcde/32/16180_2.png) [@abcde](https://discourse.julialang.org/u/abcde)\
**Post date:** [August 7, 2020, 7:47am UTC](https://discourse.julialang.org/t/question-about-hht-pkg/44477/2 "2020-08-07T07:47:26Z")

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@Fliks