Update README.md

README.md

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 This dataset contains several microstructure treatments:
-1. [`variable_radius.zip`](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/blob/main/variable_radius.zip) - Ten microstructures with defects of variable radii, from 0.01 mm to 0.5 mm. To load it, run: ```datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_files=['variable_radius.zip'])```
-2. [`variable_number.zip`](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/blob/main/variable_number.zip) - Ten microstructures with different numbers of defects, from 20 to 200. To load it, run:  ```datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_files=['variable_number.zip'])```
-3. [`circular_defects.zip`](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/blob/main/circular_defects.zip) - This data contains image data of 1000 samples of microstructures with 100 circular porosity defects having their radii uniformly distributed in the range 0.1 – 0.5 mm, and their corresponding strain fields.  To load it, run:  ```datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_files=['circular_defects.zip'])```
-4. A variety of different defect shapes in smaller datasets, with train/test splites (500 samples and 50 samples, respectively).
-    - Circles
-    - Crescents
-    - Ellipses
-    - Peanuts
-    - Rectangles
-    - Triangles
+1. [`variable_radius.zip`](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/blob/main/variable_radius.zip)
+    - Single split
+    - Ten microstructures with defects of variable radii, from 0.01 mm to 0.5 mm.
+    - ```datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_files=['variable_radius.zip'])```
+2. [`variable_number.zip`](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/blob/main/variable_number.zip)
+    - Single split
+    - Ten microstructures with different numbers of defects, from 20 to 200.
+    - ```data = datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_files=['variable_number.zip'])```
+3. [`circular_defects.zip`](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/blob/main/circular_defects.zip)
+    - Single split (1000 samples)
+    - This data contains samples of microstructures with 100 circular porosity defects having their radii uniformly distributed in the range 0.1 – 0.5 mm, and their corresponding strain fields.
+    - ```data = datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_files=['circular_defects.zip'])```
+6. A variety of different defect shapes in smaller datasets:
+    - [circle/](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/tree/main/circle)
+      - Train split (500 samples) and test split (50 samples)
+      - Circular porosity
+      - ```data = datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_dir=['circle'])```
+    - [crescent/](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/tree/main/crescent)
+      - Train split (500 samples) and test split (50 samples)
+      - Crescent-shaped porosity
+      - ```data = datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_dir=['crescent'])```
+    - [ellipse/](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/tree/main/ellipse)
+      - Train split (500 samples) and test split (50 samples)
+      - Circular porosity
+      - ```data = datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_dir=['circle'])```
+    - [peanut/](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/tree/main/peanut)
+      - Train split (500 samples) and test split (50 samples)
+      - Peanuty porosity
+      - ```data = datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_dir=['peanut'])```
+    - [rectangle/](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/tree/main/rectangle)
+      - Train split (500 samples) and test split (50 samples)
+      - Rectangular porosity
+      - ```data = datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_dir=['rectangle'])```
+    - [triangle/](https://huggingface.co/datasets/cmudrc/porous-microstructure-strain-fields/tree/main/triangle)
+      - Train split (500 samples) and test split (50 samples)
+      - Triangular porosity
+      - ```data = datasets.load_dataset("cmudrc/porous-microstructure-strain-fields", data_dir=['triangle'])```