update steps for 1D data generation

pdebench/data_gen/data_gen_NLE/README.md

@@ -23,3 +23,62 @@ dim: 2
 python data_gen/data_gen_NLE/Data_Merge.py
 ```
 
+----------------------------
+
+#### Data generation for 1D Advection Equation:
+
+```
+# generate data and save as .npy array
+cd PDEBench/pdebench/data_gen/data_gen_NLE/AdvectionEq
+
+# Either generate a single file
+CUDA_VISIBLE_DEVICES='2,3' python3 advection_multi_solution_Hydra.py +multi=beta1e0.yaml
+
+# Or generate all files
+bash run_trainset.sh
+
+# serialize to hdf5 by transforming npy file
+# before executing Data_Merge.py, change "type" and "savedir" values in PDEBench/pdebench/data_gen/data_gen_NLE/config/config.yaml
+cd ..
+python Data_Merge.py
+```
+
+--------------
+
+#### Data generation for 1D Burgers' Equation:
+
+```
+# generate data and save as .npy array
+cd PDEBench/pdebench/data_gen/data_gen_NLE/BurgersEq/
+
+# Either generate a single file
+CUDA_VISIBLE_DEVICES='0,2' python3 burgers_multi_solution_Hydra.py +multi=1e-1.yaml
+
+# Or generate all files
+bash run_trainset.sh
+
+# serialize to hdf5 by transforming npy file
+# before executing Data_Merge.py, change "type" and "savedir" values in PDEBench/pdebench/data_gen/data_gen_NLE/config/config.yaml
+cd ..
+python Data_Merge.py
+```
+
+---------------
+
+#### Data generation for 1D Reaction Diffusion Equation:
+
+```
+# generate data and save as .npy array
+cd PDEBench/pdebench/data_gen/data_gen_NLE/ReactionDiffusionEq/
+
+# Either generate a single file
+CUDA_VISIBLE_DEVICES='0,1' python3 reaction_diffusion_multi_solution_Hydra.py +multi=Rho2e0_Nu5e0.yaml
+
+# Or generate all files
+bash run_trainset.sh
+
+# serialize to hdf5 by transforming npy file
+# before executing Data_Merge.py, change "type" and "savedir" values in PDEBench/pdebench/data_gen/data_gen_NLE/config/config.yaml
+cd ..
+python Data_Merge.py
+```