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Update hyperparameters section (see #3352)

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Ines Montani 2019-03-06 14:40:30 +01:00
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website/docs/api/cli.md
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@ -208,21 +208,24 @@ $ python -m spacy train [lang] [output_path] [train_path] [dev_path]
### Environment variables for hyperparameters {#train-hyperparams new="2"}
spaCy lets you set hyperparameters for training via environment variables. This
is useful, because it keeps the command simple and allows you to
[create an alias](https://askubuntu.com/questions/17536/how-do-i-create-a-permanent-bash-alias/17537#17537)
for your custom `train` command while still being able to easily tweak the
hyperparameters. For example:
spaCy lets you set hyperparameters for training via environment variables. For
example:
```bash
$ parser_hidden_depth=2 parser_maxout_pieces=1 spacy train [...]
$ token_vector_width=256 learn_rate=0.0001 spacy train [...]
```
```bash
### Usage with alias
alias train-parser="spacy train en /output /data /train /dev -n 1000"
parser_maxout_pieces=1 train-parser
```
> #### Usage with alias
>
> Environment variables keep the command simple and allow you to to
> [create an alias](https://askubuntu.com/questions/17536/how-do-i-create-a-permanent-bash-alias/17537#17537)
> for your custom `train` command while still being able to easily tweak the
> hyperparameters.
>
> ```bash
> alias train-parser="python -m spacy train en /output /data /train /dev -n 1000"
> token_vector_width=256 train-parser
> ```
| Name | Description | Default |
| -------------------- | --------------------------------------------------- | ------- |