Metrics

[Lundez]

Add remaining metrics

fun confusionMatrix() {
        TODO("")
    }

    fun f1() {
//        requireSameShape(test, predicted)
        TODO("")
    }

    // precision = TP / (TP + FP)
    fun <T : Number> precision(test: D2Array<T>, predicted: D2Array<T>): Double {
        requireSameShape(test, predicted)

        val truePositive = (0 until test.shape[0]).fold(0) {
                acc, row ->
            if (test[row] == predicted[row]) acc + 1 else acc
        }

        return  truePositive / test.shape[0].toDouble()
    }

    // recall = TP / (TP + FN)
    fun <T : Number> recall(test: D2Array<T>, predicted: D2Array<T>) {
        requireSameShape(test, predicted)
        TODO("")
    }