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Inconsistency in libsvm formats (#1325)

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* Inconsistency in libsvm formats

* note on libsvm formats
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Muhammad Haseeb Tariq 2016-07-03 19:49:41 +02:00 committed by Tianqi Chen
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jvm-packages/README.md
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@ -16,6 +16,10 @@ and power xgboost into JVM ecosystem.
You can find more about XGBoost on [Documentation](https://xgboost.readthedocs.org/en/latest/jvm/index.html) and [Resource Page](../demo/README.md). You can find more about XGBoost on [Documentation](https://xgboost.readthedocs.org/en/latest/jvm/index.html) and [Resource Page](../demo/README.md).
## Hello World ## Hello World
*NOTE*: Use **1-based** ascending indexes for libsvm format in distributed training mode:
- Spark does the internal conversion, and do not accept formats that are 0-based
- WHEREAS - use **0-based** indexes format when predicting (for instance using the saved model in the Python package) in normal mode
### XGBoost Scala ### XGBoost Scala
```scala ```scala
import ml.dmlc.xgboost4j.scala.DMatrix import ml.dmlc.xgboost4j.scala.DMatrix