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https://issues.apache.org/jira/browse/MAHOUT-1962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15995462#comment-15995462
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ASF GitHub Bot commented on MAHOUT-1962:
----------------------------------------
Github user rawkintrevo commented on a diff in the pull request:
https://github.com/apache/mahout/pull/300#discussion_r114629137
--- Diff:
math-scala/src/main/scala/org/apache/mahout/math/algorithms/regression/tests/FittnessTests.scala
---
@@ -47,10 +52,44 @@ object FittnessTests {
// https://en.wikipedia.org/wiki/Mean_squared_error
def MeanSquareError[R[K] <: RegressorModel[K], K](model: R[K],
residuals: DrmLike[K]): R[K] = {
+ // TODO : I think mse denom should be (row - col) ??
val mse = residuals.assign(SQUARE).sum / residuals.nrow
model.mse = mse
model.testResults += ('mse -> mse)
model.summary += s"\nMean Squared Error: ${mse}"
model
}
+
+ // https://en.wikipedia.org/wiki/xxxx
--- End diff --
might as well finish out the link.
> Add F-test to Linear Regression Fitness Tests
> ----------------------------------------------
>
> Key: MAHOUT-1962
> URL: https://issues.apache.org/jira/browse/MAHOUT-1962
> Project: Mahout
> Issue Type: Improvement
> Components: Algorithms
> Affects Versions: 0.12.0, 0.12.1, 0.13.0, 0.12.2
> Reporter: Dustin VanStee
> Priority: Minor
> Labels: beginner
> Fix For: 0.13.1
>
> Original Estimate: 96h
> Remaining Estimate: 96h
>
> This update will modify
> org.apache.mahout.math.algorithms.regression.tests.FittnessTests.scala and
> add an overall Ftest for significance of one or more parameters being not
> equal to zero.
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