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From: Pranavan135 <git@git.apache.org>
To: dev@stratos.apache.org
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References: <git-pr-382-stratos@git.apache.org>
In-Reply-To: <git-pr-382-stratos@git.apache.org>
Subject: [GitHub] stratos pull request: GSoC - Curve Fitting
Content-Type: text/plain
Message-Id: <20150723024540.B000AE17FC@git1-us-west.apache.org>
Date: Thu, 23 Jul 2015 02:45:40 +0000 (UTC)

Github user Pranavan135 commented on a diff in the pull request:

    https://github.com/apache/stratos/pull/382#discussion_r35286099
  
    --- Diff: extensions/cep/stratos-cep-extension/src/main/java/org/apache/stratos/cep/extension/ExponentialMovingAverage.java ---
    @@ -0,0 +1,32 @@
    +package org.apache.stratos.cep.extension;
    +
    +/**
    + * class to demonstrate how EMA works
    + */
    +public class ExponentialMovingAverage {
    +    public Double value;
    +
    +    /**
    +     * smooth the value with respect to the previous value
    +     * @param value
    +     * @return
    +     */
    +    public double getAverage(double value){
    +        if(this.value == null){
    +            this.value = value;
    +            return value;
    +        }
    +
    +        /**
    +         * calculating smoothed value
    +         */
    +        double newValue = CurveFinderWindowProcessor.ALPHA * value + (1.0 - CurveFinderWindowProcessor.ALPHA)*value;
    +        this.value = newValue;
    +
    +        return newValue;
    +    }
    +
    +    public Double getValue() {
    +        return value;
    +    }
    +}
    --- End diff --
    
    License Header Added


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