KNNClassifier has no field or method optimisedEuclideanPredict

[waldirborbajr]

Hi, I am trying to run a simple example and I'm facing the error below.

❯ go run cmd/main.go

github.com/sjwhitworth/golearn/knn

../../../go/pkg/mod/github.com/sjwhitworth/[email protected]/knn/knn.go:132:16: KNN.optimisedEuclideanPredict undefined (type *KNNClassifier has no field or method optimisedEuclideanPredict)

❯ go version
go version go1.19 linux/amd64

❯ cat go.mod
module localhost/mlpipeline

go 1.19

require github.com/sjwhitworth/golearn v0.0.0-20211014193759-a8b69c276cd8

require (
github.com/gonum/blas v0.0.0-20181208220705-f22b278b28ac // indirect
github.com/gonum/lapack v0.0.0-20181123203213-e4cdc5a0bff9 // indirect
github.com/gonum/matrix v0.0.0-20181209220409-c518dec07be9 // indirect
github.com/google/go-cmp v0.4.0 // indirect
github.com/guptarohit/asciigraph v0.5.1 // indirect
github.com/mattn/go-runewidth v0.0.7 // indirect
github.com/olekukonko/tablewriter v0.0.4 // indirect
github.com/rocketlaunchr/dataframe-go v0.0.0-20201007021539-67b046771f0b // indirect
golang.org/x/exp v0.0.0-20200331195152-e8c3332aa8e5 // indirect
golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a // indirect
gonum.org/v1/gonum v0.8.1 // indirect
)

... code ...

// KNN classifier
cls := knn.NewKnnClassifier("euclidean", "linear", 2)

[guiyang882]

hi, i think you use the wrong way to use this packages. here its the simply examples.

cd ~/go/src/github.com/sjwhitworth/golearn/examples/knnclassifier
go build knnclassifier_iris.go

then you will get this

 wuming@B-Q4GZQ05P-1944  ~/go/src/github.com/sjwhitworth/golearn/examples/knnclassifier   master ±  ll
total 6184
-rwxr-xr-x  1 wuming  staff   3.0M Nov 14 21:50 knnclassifier_iris
-rw-r--r--  1 wuming  staff   923B Oct 14 15:57 knnclassifier_iris.go

then run the command

./knnclassifier_iris


Instances with 88 row(s) 1 attribute(s)
Attributes: 
*       CategoricalAttribute("Species", [Iris-setosa Iris-versicolor Iris-virginica])

Data:
        Iris-setosa 
        Iris-virginica 
        Iris-virginica 
        Iris-versicolor 
        Iris-setosa 
        Iris-virginica 
        Iris-setosa 
        Iris-versicolor 
        Iris-setosa 
        Iris-setosa 
        Iris-versicolor 
        Iris-versicolor 
        Iris-versicolor 
        Iris-setosa 
        Iris-virginica 
        Iris-setosa 
        Iris-setosa 
        Iris-setosa 
        Iris-virginica 
        Iris-versicolor 
        Iris-setosa 
        Iris-setosa 
        Iris-versicolor 
        Iris-versicolor 
        Iris-virginica 
        Iris-virginica 
        Iris-setosa 
        Iris-virginica 
        Iris-versicolor 
        Iris-virginica 
        ...
58 row(s) undisplayed
Reference Class True Positives  False Positives True Negatives  Precision       Recall  F1 Score
--------------- --------------  --------------- --------------  ---------       ------  --------
Iris-versicolor 27              1               58              0.9643          0.9310  0.9474
Iris-setosa     30              0               58              1.0000          1.0000  1.0000
Iris-virginica  28              2               57              0.9333          0.9655  0.9492
Overall accuracy: 0.9659

[etgcrog]

I was having the same error. The library requires you to have the C compiler (cpp), I think installing it correctly you can solve this problem.