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From: ZJaffee <git@git.apache.org>
To: dev@horn.incubator.apache.org
Reply-To: dev@horn.incubator.apache.org
Message-ID: <git-pr-8-incubator-horn@git.apache.org>
Subject: [GitHub] incubator-horn pull request: Quick fix from HORN-9
Content-Type: text/plain
Date: Mon, 23 Nov 2015 19:09:00 +0000 (UTC)

GitHub user ZJaffee opened a pull request:

    https://github.com/apache/incubator-horn/pull/8

    Quick fix from HORN-9

    I noticed another error that was brought in, the derivative of the Sigmoid function is supposed to be 
    ```
    f(x) = 1.0 / (1 + Math.exp(-x))
    df(x)/dx = f(x)(1-f(x))
    ```
    currently the class has the functions written as 
    ```
    apply(x) = 1.0 / (1 + Math.exp(-x))
    applyDerivative(x) = (x)(1-x)
    ```

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/ZJaffee/incubator-horn master

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/incubator-horn/pull/8.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #8
    
----
commit 99c3f4e8ab393ba19355a280ac141d4827fb7140
Author: Zachary Jaffee <zjaffee@us.ibm.com>
Date:   2015-11-23T19:02:46Z

    Quick fix from HORN-9

----


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