Github user sethah commented on a diff in the pull request:
https://github.com/apache/spark/pull/15621#discussion_r85012212
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala ---
@@ -137,61 +133,68 @@ private[ml] class WeightedLeastSquares(
}
}
- // scale aBar to standardized space in-place
- val aBarValues = aBar.values
- var j = 0
- while (j < numFeatures) {
- if (aStd(j) == 0.0) {
- aBarValues(j) = 0.0
- } else {
- aBarValues(j) /= aStd(j)
- }
- j += 1
- }
+ val bBar = summary.bBar / bStd
+ val bbBar = summary.bbBar / (bStd * bStd)
- // scale abBar to standardized space in-place
- val abBarValues = abBar.values
- val aStdValues = aStd.values
- j = 0
- while (j < numFeatures) {
- if (aStdValues(j) == 0.0) {
- abBarValues(j) = 0.0
- } else {
- abBarValues(j) /= (aStdValues(j) * bStd)
+ val aStd = summary.aStd
+ val aBar = {
+ val _aBar = summary.aBar
+ var i = 0
+ // scale aBar to standardized space in-place
+ while (i < numFeatures) {
+ if (aStd(i) == 0.0) {
+ _aBar.values(i) = 0.0
+ } else {
+ _aBar.values(i) /= aStd(i)
+ }
+ i += 1
}
- j += 1
+ _aBar
}
-
- // scale aaBar to standardized space in-place
- val aaBarValues = aaBar.values
- j = 0
- var p = 0
- while (j < numFeatures) {
- val aStdJ = aStdValues(j)
+ val abBar = {
+ val _abBar = summary.abBar
var i = 0
- while (i <= j) {
- val aStdI = aStdValues(i)
- if (aStdJ == 0.0 || aStdI == 0.0) {
- aaBarValues(p) = 0.0
+ // scale abBar to standardized space in-place
+ while (i < numFeatures) {
+ if (aStd(i) == 0.0) {
--- End diff --
similar thing here, you're calling `aStd.apply(i)` which in turn calls an
internal getter for `aStd.values` which then indexes the array.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
