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| author | actuaryzhang <actuaryzhang10@gmail.com> | 2017-02-08 10:42:20 -0800 |
|---|---|---|
| committer | Joseph K. Bradley <joseph@databricks.com> | 2017-02-08 10:42:20 -0800 |
| commit | 1aeb9f6cba07a52d76e5a52b13b474f5552e5f34 (patch) | |
| tree | 195eed60a5ea0b049c250292acf7c3d67adff211 /sql/hive/src | |
| parent | 15627ac7435f97bb71d6f8645c75a06a8b2b2388 (diff) | |
| download | spark-1aeb9f6cba07a52d76e5a52b13b474f5552e5f34.tar.gz spark-1aeb9f6cba07a52d76e5a52b13b474f5552e5f34.tar.bz2 spark-1aeb9f6cba07a52d76e5a52b13b474f5552e5f34.zip | |
[SPARK-19400][ML] Allow GLM to handle intercept only model
## What changes were proposed in this pull request?
Intercept-only GLM is failing for non-Gaussian family because of reducing an empty array in IWLS. The following code `val maxTolOfCoefficients = oldCoefficients.toArray.reduce { (x, y) => math.max(math.abs(x), math.abs(y))` fails in the intercept-only model because `oldCoefficients` is empty. This PR fixes this issue.
yanboliang srowen imatiach-msft zhengruifeng
## How was this patch tested?
New test for intercept only model.
Author: actuaryzhang <actuaryzhang10@gmail.com>
Closes #16740 from actuaryzhang/interceptOnly.
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