com.tencent.angel.ml.metrics.Metric.scala Maven / Gradle / Ivy

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/*
 * Tencent is pleased to support the open source community by making Angel available.
 *
 * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in 
 * compliance with the License. You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/Apache-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 *
 */


package com.tencent.angel.ml.metrics

/**
  * Algorithm metric calculate interface
  */
trait Metric {
  def DEFAULT_METRIC_FORMAT = "%10.6e"

  /**
    * Set metric calculate dependency counters
    *
    * @param values dependency counter values
    */
  def setValues(values: Double*)

  /**
    * Merge dependency counters
    *
    * @param other
    * @return
    */
  def merge(other: Metric): Metric

  /**
    * Use counters calculate metric
    *
    * @return metric value
    */
  def calculate: Double

  def toString: String
}