# A question about Fuzzy C-means code
**URL:** https://discourse.julialang.org/t/a-question-about-fuzzy-c-means-code/40988
**Category:** Optimization (Mathematical)
**Tags:** question
**Created:** [June 8, 2020, 1:13pm UTC](https://discourse.julialang.org/t/a-question-about-fuzzy-c-means-code/40988 "2020-06-08T13:13:21Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@abcde](https://discourse.julialang.org/u/abcde)
#### Post date: [June 8, 2020, 1:13pm UTC](https://discourse.julialang.org/t/a-question-about-fuzzy-c-means-code/40988/1 "2020-06-08T13:13:21Z")
```julia
using RDatasets, Clustering, Plots
using DataFrames
using CSV
iris = dataset("datasets", "iris"); # load the data
features = collect(Matrix(iris[:, 1:4])'); # features to use for clustering
result = fuzzy_cmeans(features, 3, 4, maxiter=150, display=:iter)
scatter(iris.PetalLength, iris.PetalWidth, marker_z=result.centers,color=:lightrainbow, legend=false)
```
there are questions about my code
it shows
ERROR: LoadError: error compiling \_plot!: error compiling \_display: could not load library “libGR.dll”
The specified module could not be found.
why?thank you !!
---
### Author:  [@nilshg](https://discourse.julialang.org/u/nilshg)
#### Post date: [June 8, 2020, 1:56pm UTC](https://discourse.julialang.org/t/a-question-about-fuzzy-c-means-code/40988/2 "2020-06-08T13:56:59Z")
Sounds like your `GR` installation isn’t working properly (GR is the default backend for `Plots`). Try rebuilding it by doing `]build GR`
---
### Author:  [@abcde](https://discourse.julialang.org/u/abcde)
#### Post date: [June 8, 2020, 2:47pm UTC](https://discourse.julialang.org/t/a-question-about-fuzzy-c-means-code/40988/3 "2020-06-08T14:47:48Z")
I have already built the “GR” but it does not work 😨,thank you any way.