update to high frequency sample

PTB-XL.py

@@ -34,7 +34,7 @@ class PTBXL(datasets.GeneratorBasedBuilder):
                     "ecg_id": datasets.Value("int64"),
                     "age": datasets.Value("int32"),
                     "sex": datasets.Value("string"),
-                    "ecg_array": datasets.Array2D(shape=(1000, 12), dtype="float32"),
+                    "ecg_array": datasets.Array2D(shape=(5000, 12), dtype="float32"),
                 }
             ),
             homepage=_HOMEPAGE,
@@ -70,7 +70,7 @@ class PTBXL(datasets.GeneratorBasedBuilder):
     
     def _generate_examples(self, dataframe, data_dir, split):
         for _, row in dataframe.iterrows():
-            ecg_path = os.path.join(data_dir, row['filename_lr'])
+            ecg_path = os.path.join(data_dir, row['filename_hr'])
             ecg_array = np.asarray(wfdb.rdsamp(ecg_path)[0])
             yield row.name, {
                 "ecg_id": row.name,