Improved README

README.md

@@ -10,24 +10,58 @@
 
 📊 NMSLIB visualization tool
 
-> *WORK IN PROGRESS PROJECT*
-
 ## Installation
 
 Install client via pip. Ideally, `nmslib-viz` is well supported for Python >= 3.7.
 
 ```bash
-pip install nmslib-viz
+pip3 install nmslib-viz --no-binary nmslib
 ```
 
+> The `--no-binary` option is important for a better CPU performance.
+
 ## Usage
 
 Just run it like this:
 
 ```bash
-nmslib-viz
+nmslib-viz INDEX_FILE_PATH [--number_points NUMBER_POINTS]
 ```
 
+Arguments:
+
+- `INDEX_FILE_PATH`: String pointing to the NMSLIB file path. There has to be the additional .dat file for the index, the one that is created when uses the `save_data=True` option in the saveIndex() function. For example: `index.nmslib` and `index.nmslib.dat` need to exist but only `index.nmslib` has to be provided as this parameter.
+- `NUMBER_POINTS`: (optional) Number of points as a maximum to plot from the NMSLIB index data, where has to be 1 at least. Default value: 1000.
+
+## Result
+
+![Example](docs/images/example.png)
+
+> **Note**: this example is a representation of the [SearchLy](https://github.com/AlbertSuarez/searchly) index.
+
+## Development
+
+### Recommendations
+
+Usage of [virtualenv](https://realpython.com/blog/python/python-virtual-environments-a-primer/) is recommended for package library / runtime isolation.
+
+### Installation
+
+1. Setup virtual environment
+
+2. Install dependencies
+
+  ```bash
+  pip3 install -r requirements.lock
+  ```
+
+3. Install locally
+
+  ```bash
+  pip3 install . --no-binary nmslib
+  ```
+
+
 ## Contributing
 
 Suggestions, improvements, and enhancements are always welcome! If you have any issues, please do raise one in the Issues section. If you have an improvement, do file an issue to discuss the suggestion before creating a PR.