added example for arxiv data path

README.md

@@ -26,7 +26,11 @@ arxiv/
     cs.NE/
         *.txt
 ```
-3. set Data.path from the [Dataloader-module](Dataloader.py) to the path where your arxiv folder is (e.g. */home/students/holzinger/tmp/arxiv*)
+3. set Data.path from the [Dataloader-module](Dataloader.py) to the path where your arxiv folder is (e.g. */home/students/holzinger/tmp/arxiv*):
+ ```python
+dataloader = Data("arxiv")
+dataloader.path = "/home/students/holzinger/tmp/arxiv"
+ ```
 ## 2. Datasets :floppy_disk:
 
 To compare against results from other publications ([Big Bird](https://proceedings.neurips.cc/paper/2020/hash/c8512d142a2d849725f31a9a7a361ab9-Abstract.html), [Linformer](https://arxiv.org/abs/2006.04768) and [Longformer](https://arxiv.org/abs/2004.05150)) the following text classification datasets are used: