Update README.md

README.md

@@ -701,21 +701,28 @@ visualization.plot_boundary(boundary)
 ```
 ![Plot of plasma boundary](boundary.png)
 ![Plot of boundary cross-sections](boundary_cross_sections.png)
-```
+
 Stream and instantiate the VMEC ideal MHD equilibria:
 ```python
 import datasets
-from research.neurips_2025.open_source.mhd import vmec_utils
+from constellaration.mhd import vmec_utils
+from constellaration.utils import visualization
 
 ds = datasets.load_dataset("proxima-fusion/constellaration", "vmecpp_ideal_mhd_equilibria", streaming=True)["train"]
 
 for batch in ds.filter(lambda row: row["vmecpp_wout_json"] is not None).iter(batch_size=1):
-    vmecpp_wout_json = batch["vmecpp_wout_json"][0]
-    vmecpp_wout = vmec_utils.VmecppWOut.model_validate_json(vmecpp_wout_json)
     break
 
-print(vmecpp_wout.n_field_periods)
+vmecpp_wout_json = batch["vmecpp_wout_json"][0]
+vmecpp_wout = vmec_utils.VmecppWOut.model_validate_json(vmecpp_wout_json)
+
+plasma_config_id = batch["plasma_config_id"][0]
+boundary_json = full_json_df.loc[plasma_config_id]["boundary.surface"]
+boundary = surface_rz_fourier.SurfaceRZFourier.model_validate_json(boundary_json)
+
+visualization.plot_flux_surfaces(vmecpp_wout, boundary)
 ```
+![Plot of flux surfaces](flux_surfaces.png)
 
 ## Dataset Structure