updating README with figure

README.md

@@ -67,11 +67,17 @@ url={https://openreview.net/forum?id=WJnJHp741K}
 </details>
 
 
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 ## Data Collection Process
 The Perovs-dopants dataset was constructed by first selecting base perovskite materials from Materials Project [1], a oxide perovskite database [2], and a halide perovskite database [3], and substituting a single atom at either A-site or B-site of the perovskite structure. A-site and B-site vacancies were also included. For each defect structure, atomic configurations were optimized using CP2K with the PBE functional, and the relaxation process continued until forces on all atoms were below 0.02 eV/A.
 
+<figure>
+  <img src="docs/perovs_dopants_elements.png" alt="Perovs-Dopants Dataset Description" />
+  <figcaption>(a) Distribution of elements in the defect dataset. A and B site elements, and X site elements
+are shown in the left figure, and the substituent elements are shown in the right figure. (b) t-SNE plot
+comparing the chemical space covered by the MPtrj and Perovs-Dopants datasets..</figcaption>
+</figure>
+
+
 [1] Anubhav Jain, Shyue Ping Ong, Geoffroy Hautier, Wei Chen, William Davidson Richards, Stephen Dacek, Shreyas Cholia, Dan Gunter, David Skinner, Gerbrand Ceder, and Kristin A. Persson. Commentary: The materials project: A materials genome approach to accelerating materials innovation, 2013. ISSN 2166532X.
 
 [2] Ivano E. Castelli, David D. Landis, Kristian S. Thygesen, Soren Dahl, Ib Chorkendorff, Thomas F. Jaramillo, and Karsten W. Jacobsen. New cubic perovskites for one- and two-photon water splitting using the computational materials repository. Energy and Environmental Science, 5:9034–9043, 10 2012. ISSN 17545692. doi: 10.1039/c2ee22341d.