anchor.diff:  [frame="all"]
   |===
   | Plugin version | Elasticsearch version | Release date
  +| https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.5.1.2/elasticsearch-linear-regression-5.5.1.2.zip[5.5.1.2]        | 5.5.1 | Aug  29, 2017
   | https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.5.1.1/elasticsearch-linear-regression-5.5.1.1.zip[5.5.1.1]        | 5.5.1 | Jul  27, 2017
   | https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.5.0.1/elasticsearch-linear-regression-5.5.0.1.zip[5.5.0.1]        | 5.5.0 | Jul  18, 2017
   | https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.3.0.2/elasticsearch-linear-regression-5.3.0.2.zip[5.3.0.2]        | 5.3.0 | Jul  16, 2017
  
positive.code: `rss`:: Residual sum of squares as a measure of the discrepancy between the data and the estimated model.
          The lower the `rss` number, the smaller the error of the prediction, and the better the model.
  `mse`:: Mean squared error or rather `rss` divided by the number of documents consumed for model estimation.
  `coefficients`:: Estimated coefficients
    image:http://latex.codecogs.com/gif.latex?\theta_0,%20\theta_1,%20\theta_2,%20\theta_3,.%20.%20.,%20\theta_C%20[]
      of the linear linear hypothesis function ``h(x)``.
  
negative.code: 
  [source]
  ----
  ./bin/elasticsearch-plugin install https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.5.1.2/elasticsearch-linear-regression-5.5.1.2.zip
  ----
  The plugin will be installed under the name "linear-regression".
  Do not forget to restart the node after installing.
  