prodigeni / golearn

Machine Learning for Go

GoLearn

GoLearn is a 'batteries included' machine learning library for Go. Simplicity, paired with customisability, is the goal. We are in active development, and would love comments from users out in the wild. Drop us a line on Twitter.

twitter: @golearn_ml

Install

See here for installation instructions.

Getting Started

Data are loaded in as Instances. You can then perform matrix like operations on them, and pass them to estimators. GoLearn implements the scikit-learn interface of Fit/Predict, so you can easily swap out estimators for trial and error. GoLearn also includes helper functions for data, like cross validation, and train and test splitting.

// Load in a dataset, with headers. Header attributes will be stored.
// Think of instances as a Data Frame structure in R or Pandas.
// You can also create instances from scratch.
data, err := base.ParseCSVToInstances("datasets/iris_headers.csv", true)

// Print a pleasant summary of your data.
fmt.Println(data)

// Split your dataframe into a training set, and a test set, with an 80/20 proportion.
trainTest := base.InstancesTrainTestSplit(rawData, 0.8)
trainData := trainTest[0]
testData := trainTest[1]

// Instantiate a new KNN classifier. Euclidean distance, with 2 neighbours.
cls := knn.NewKnnClassifier("euclidean", 2)

// Fit it on your training data.
cls.Fit(trainData)

// Get your predictions against test instances.
predictions := cls.Predict(testData)

// Print a confusion matrix with precision and recall metrics.
confusionMat := evaluation.GetConfusionMatrix(testData, predictions)
fmt.Println(evaluation.GetSummary(confusionMat))

Iris-virginica	28	2	  56	0.9333	0.9333  0.9333
Iris-setosa	    29	0	  59	1.0000  1.0000	1.0000
Iris-versicolor	27	2	  57	0.9310	0.9310  0.9310
Overall accuracy: 0.9545

Examples

GoLearn comes with practical examples. Dive in and see what is going on.

cd $GOPATH/src/github.com/sjwhitworth/golearn/examples/knnclassifier
go run knnclassifier_iris.go

cd $GOPATH/src/github.com/sjwhitworth/golearn/examples/instances
go run instances.go

cd $GOPATH/src/github.com/sjwhitworth/golearn/examples/trees
go run trees.go

Join the team

Please send me a mail at stephen dot whitworth at hailocab dot com.