Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/16434#discussion_r94867603
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/feature/ChiSqSelectorSuite.scala ---
@@ -35,22 +35,63 @@ class ChiSqSelectorSuite extends SparkFunSuite with
MLlibTestSparkContext
// Toy dataset, including the top feature for a chi-squared test.
// These data are chosen such that each feature's test has a distinct
p-value.
- /* To verify the results with R, run:
- library(stats)
- x1 <- c(8.0, 0.0, 0.0, 7.0, 8.0)
- x2 <- c(7.0, 9.0, 9.0, 9.0, 7.0)
- x3 <- c(0.0, 6.0, 8.0, 5.0, 3.0)
- y <- c(0.0, 1.0, 1.0, 2.0, 2.0)
- chisq.test(x1,y)
- chisq.test(x2,y)
- chisq.test(x3,y)
+ /*
+ * Contingency tables
--- End diff --
It's kind of nice seeing these tables, but for validation, it's much easier
for users to check using R. Could you please include a section for verifying
the results with R, like there was before?
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