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Logit-GFN

Official Code for Learning to Scale Logits for Temperature-conditional GFlowNets

Environment Setup

To install dependecies, please run the command pip install -r requirement.txt. Note that python version should be < 3.8 for running RNA-Binding tasks. You should install pyg with the following command

pip install torch_geometric
pip install pyg_lib torch_scatter torch_sparse torch_cluster torch_spline_conv -f https://data.pyg.org/whl/torch-1.13.0+cu117.html

Code references

Our implementation is heavily based on "Towards Understanding and Improving GFlowNet Training" (https://github.com/maxwshen/gflownet).

Large Files

You can download additional large files by following link: https://drive.google.com/drive/folders/1JobUWGowoiQxGWVz3pipdfcjhtdY4CVq?usp=sharing

These files should be placed in datasets

Offline Generalization

You can run the following command to valiate the effectiveness of Logit-GFN on offline generalization. As a default setting, Logit-GFN and Layer-GFN are trained with $\beta\sim\text{Unif}[10, 50]$ and evaluate with multiple $\beta$ values from $\beta=1$ to $\beta=5,000$.

# Logit-GFN
python main.py --task offline_generalization --setting tfbind8 --temp_cond --temp_cond_type logit

# Layer-GFN
python main.py --task offline_generalization --setting tfbind8 --temp_cond --temp_cond_type layer

# Unconditional GFN
python main.py --task offline_generalization --setting tfbind8 --target_beta 5000

Online Mode Seeking

You can run the following command to validate the effectiveness of Logit-GFN on online mode seeking problems. As a default setting, Logit-GFN and Layer-GFN are trained with $\beta\sim\text{Unif}[1, 3]$ and explore with $\beta\sim\text{Unif}[1, 3]$. For unconditional GFN, we set $\beta=1$ as a default setting.

# Logit-GFN
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit

# Layer-GFN
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type layer

# Unconditional GFN
python main.py --task mode_seeking --setting tfbind8 --target_beta 1

Additional Experiments

You can change various biochemical tasks to evaluate the performance of Logit-GFN by setting --setting option.

  • Available Options: qm9str, sehstr, tfbind8, rna
python main.py --task mode_seeking --setting <setting> --temp_cond --temp_cond_type logit

You can change GFlowNet training objectives to evaluate the performance of Logit-GFN by setting --loss_type option.

  • Available Options: tb, maxent, db, subtb
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --loss_type <loss_type>

You can turn on layer-conditioning option for Logit-GFN by setting --layer-conditioning.

python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --layer-conditioning

You can turn on thermometer embedding option for Layer-GFN by setting --thermometer.

python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --thermometer

You can adjust the number of gradient steps per batch ($K$) by setting --num_steps_per_batch.

python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --num_steps_per_batch <K>

You can change $P_{\text{train}}(\beta)$, temperatue sampling distribution for Logit-GFN by setting --train_temp_dist option. There are various suboptions to decide depending on the distribution.

# Constant
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --train_temp_dist constant --train_temp 1

# Uniform
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --train_temp_dist uniform --train_temp_min 1 --train_temp_max 3

# LogUniform
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --train_temp_dist loguniform --train_temp_min 1 --train_temp_max 3

# ExpUniform
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --train_temp_dist expuniform --train_temp_min 1 --train_temp_max 3

# Normal
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --train_temp_dist normal --train_temp_min 1 --train_temp_max 3 --train_temp_mu 2 --train_temp_sigma 0.5

# Simulated Annealing
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --train_temp_dist annealing --train_temp_min 1 --train_temp_max 3

# Simulated Annealing (Inverse)
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --train_temp_dist annealing-inv --train_temp_min 1 --train_temp_max 3

You can also change $P_{\text{exp}}(\beta)$, temperatue sampling distribution for Logit-GFN by setting --exp_temp_dist option. There are various suboptions to decide depending on the distribution.

# Constant
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --exp_temp_dist constant --exp_temp 1

# Uniform
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --exp_temp_dist uniform --exp_temp_min 1 --exp_temp_max 3

# LogUniform
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --exp_temp_dist loguniform --exp_temp_min 1 --exp_temp_max 3

# ExpUniform
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --exp_temp_dist expuniform --exp_temp_min 1 --exp_temp_max 3

# Normal
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --exp_temp_dist normal --exp_temp_min 1 --exp_temp_max 3 --exp_temp_mu 2 --exp_temp_sigma 0.5

# Simulated Annealing
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --exp_temp_dist annealing --exp_temp_min 1 --exp_temp_max 3

# Simulated Annealing (Inverse)
python main.py --task mode_seeking --setting tfbind8 --temp_cond --temp_cond_type logit --exp_temp_dist annealing-inv --exp_temp_min 1 --exp_temp_max 3

Toy-Experiment

We visualize the empirical distributions from temperature-conditional GFlowNets and unconditional GFlowNets on GridWorld Environments.