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## 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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