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bifurcation_diagrams.py
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bifurcation_diagrams.py
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import numpy as np
from models.Embedding import Embedding
from models.HopfieldTransformerMFInfNPE import HopfieldTransformerMFInfNPE
from models.HopfieldTransformerMFPE import HopfieldTransformerMFPE
from plotting.plotting import plot_filtered_bifurcation_diagram_par_imshow
import os
import time
import copy
from utils import create_dir, create_dir_from_filepath
from plotting.plotting import plot_save_plane
import yaml
def create_pathname_inf_betas(num_feat_patterns, positional_embedding_size, context_size, worker_values_list,
load_from_context_mode, cfg):
"""
Given the experiment parameters, creates a path to save it.
The code is a bit intrincate for back-compatibility with older experiments.
"""
if cfg["bifurcation_mode"] == "betas":
results_folder = "results_parallel"
beta_string = ("/min_beta-" + str(worker_values_list[0]) + "-max_beta-" + str(worker_values_list[-1]) +
"-num_betas-" + str(len(worker_values_list)))
elif cfg["bifurcation_mode"] == "out":
results_folder = "results_out_parallel"
beta_string = (
"/beta_att-" + str(cfg["beta_att"]) + "-min_beta_o-" + str(worker_values_list[0]) + "-max_beta_o-" +
str(worker_values_list[-1]) + "-num_betas-" + str(len(worker_values_list)))
elif cfg["bifurcation_mode"] == "att":
results_folder = "results_att_parallel"
beta_string = (
"/beta_o-" + str(cfg["beta_o"]) + "-min_beta_att-" + str(worker_values_list[0]) + "-max_beta_att-" +
str(worker_values_list[-1]) + "-num_betas-" + str(len(worker_values_list)))
else:
raise Exception("mode not recognized (not one of [\"betas\", \"out\", \"att\", \"pe\"])")
gaussian_scale_str = cfg["gaussian_scale"]
if cfg["correlations_from_weights"] != 0:
gaussian_scale_name_str = ""
else:
gaussian_scale_name_str = f"-gaussian_scale-{gaussian_scale_str}"
num_transient_steps = cfg["num_transient_steps"]
if cfg["save_non_transient"] == True:
save_non_transient_str = ""
else:
save_non_transient_str = f"-num_transient_steps-{num_transient_steps}"
if cfg["normalize_weights_str_o"] == cfg["normalize_weights_str_att"]:
normalize_weights_name_str = "-normalize_weights-" + cfg["normalize_weights_str_att"]
else:
normalize_weights_name_str = ("-normalize_weights_att-" + cfg["normalize_weights_str_att"] +
"-normalize_weights_o-" + cfg["normalize_weights_str_o"])
scaling_str = ""
if cfg["scaling_o"] != 1:
scaling_str += "-scaling_o-" + str(cfg["scaling_o"])
if cfg["scaling_att"] != 1:
scaling_str += "-scaling_att-" + str(cfg["scaling_att"])
compute_inf_normalization_str = ""
if cfg["compute_inf_normalization"]:
compute_inf_normalization_str = "-inf_norm"
load_from_context_mode_str = ""
if load_from_context_mode != 0:
load_from_context_mode_str = "-load_from_context_mode-1"
# Save/plot results for each ini_token, W config, and num_feat_patterns
folder_path = (f"{results_folder}/infN-correlations_from_weights-" + str(cfg["correlations_from_weights"])
+ "-se_size-" + str(cfg["semantic_embedding_size"]) + "-pe_size-"
+ str(positional_embedding_size) + "-se_per_contribution-" + str(1 - cfg["epsilon_pe"])
+ "/num_feat_patterns-" + str(num_feat_patterns) + normalize_weights_name_str + scaling_str +
compute_inf_normalization_str + "-reorder_weights-" +
str(int(cfg["reorder_weights"])) + "-num_segments_corrs-" + str(cfg["num_segments_corrs"])
+ "-pe_mode-" + str(cfg["pe_mode"]) + gaussian_scale_name_str + "/max_sim_steps-"
+ str(cfg["max_sim_steps"]) + save_non_transient_str + "-context_size-" + str(context_size)
+ beta_string + load_from_context_mode_str)
return folder_path
def create_pathname_inf_pes(num_feat_patterns, positional_embedding_size, context_size, worker_values_list,
load_from_context_mode, cfg):
"""
Given the experiment parameters, creates a path to save it.
The code is a bit intrincate for back-compatibility with older experiments.
"""
epsilon_pe_string = ("/min_epsilon_pe-" + str(worker_values_list[0]) + "-min_epsilon_pe-" +
str(worker_values_list[-1]) + "-num_pes-" + str(len(worker_values_list)))
gaussian_scale_str = cfg["gaussian_scale_str"]
if cfg["correlations_from_weights"] != 0:
gaussian_scale_name_str = ""
else:
gaussian_scale_name_str = f"-gaussian_scale-{gaussian_scale_str}"
num_transient_steps = cfg["num_transient_steps"]
if cfg["save_non_transient"]:
save_non_transient_str = ""
else:
save_non_transient_str = f"-num_transient_steps-{num_transient_steps}"
if cfg["normalize_weights_str_o"] == cfg["normalize_weights_str_att"]:
normalize_weights_name_str = "-normalize_weights-" + cfg["normalize_weights_str_att"]
else:
normalize_weights_name_str = ("-normalize_weights_att-" + cfg["normalize_weights_str_att"] +
"-normalize_weights_o-" + cfg["normalize_weights_str_o"])
scaling_str = ""
if cfg["scaling_o"] != 1:
scaling_str += "-scaling_o-" + str(cfg["scaling_o"])
if cfg["scaling_att"] != 1:
scaling_str += "-scaling_att-" + str(cfg["scaling_att"])
compute_inf_normalization_str = ""
if cfg["compute_inf_normalization"]:
compute_inf_normalization_str = "-inf_norm"
load_from_context_mode_str = ""
if load_from_context_mode != 0:
load_from_context_mode_str = "-load_from_context_mode-1"
if cfg["beta_att"] == cfg["beta_o"]:
beta_string = "-beta-" + str(cfg["beta_att"])
else:
beta_string = "-beta_o-" + str(cfg["beta_o"]) + "-beta_att-" + str(cfg["beta_att"])
# Save/plot results for each ini_token, W config, and num_feat_patterns
folder_path = ("results_pe_parallel/infN-correlations_from_weights-" + str(cfg["correlations_from_weights"])
+ "-se_size-" + str(cfg["semantic_embedding_size"]) + "-pe_size-"
+ str(positional_embedding_size) + beta_string
+ "/num_feat_patterns-" + str(num_feat_patterns) + normalize_weights_name_str + scaling_str +
compute_inf_normalization_str + "-reorder_weights-" +
str(int(cfg["reorder_weights"])) + "-num_segments_corrs-" + str(cfg["num_segments_corrs"])
+ "-pe_mode-" + str(cfg["pe_mode"]) + gaussian_scale_name_str + "/max_sim_steps-"
+ str(cfg["max_sim_steps"]) + save_non_transient_str + "-context_size-" + str(context_size)
+ epsilon_pe_string + load_from_context_mode_str)
return folder_path
def create_pathname(num_feat_patterns, positional_embedding_size, context_size, worker_values_list,
load_from_context_mode, cfg):
if cfg["bifurcation_mode"] == "pe":
pathname = create_pathname_inf_pes(num_feat_patterns, positional_embedding_size, context_size,
worker_values_list, load_from_context_mode, cfg)
else:
pathname = create_pathname_inf_betas(num_feat_patterns, positional_embedding_size, context_size,
worker_values_list, load_from_context_mode, cfg)
return pathname
def define_ini_token(ini_token_from_w, HT, ini_token_idx, ini_tokens_list):
"""
Defines how to set the initial token
"""
if ini_token_from_w == 0:
# Encode initial token with position 0
x0 = copy.deepcopy(ini_tokens_list[ini_token_idx])
elif ini_token_from_w == 1:
x0 = copy.deepcopy(HT.Wo[ini_token_idx])
elif ini_token_from_w == 2:
x0 = copy.deepcopy(HT.Wv[ini_token_idx])
elif ini_token_from_w == 3:
x0 = copy.deepcopy(HT.Wq[ini_token_idx])
elif ini_token_from_w == 4:
x0 = copy.deepcopy(HT.Wk[ini_token_idx])
else:
raise Exception("ini_token_idx is not in the range [0,4]")
return x0
def save_context(context_window, folder_path_chpt, beta_idx):
"""
Saves the mean-field values associated to the context window
"""
att_window, mv_window, mq_window, mk_window = context_window
chpt_path = folder_path_chpt + f"/beta_idx-{beta_idx}_window_chpt.npz"
np.savez_compressed(chpt_path,
mv_window=mv_window,
mq_window=mq_window,
mk_window=mk_window,
att_window=att_window)
def load_context(folder_path_chpt, beta_idx):
"""
Load the mean-field values associated to the context window of a previous experiment.
:param beta_idx index of the beta from which to load the context window
"""
chpt_path = folder_path_chpt + f"/beta_idx-{beta_idx}_window_chpt.npz"
cw = np.load(chpt_path)
return cw['mv_window'], cw['mq_window'], cw['mk_window'], cw['att_window']
def initialize_bifurcation_variable(HT, worker_values_list, worker_id, mode):
if mode == "betas":
HT.set_betas(worker_values_list[worker_id], worker_values_list[worker_id])
elif mode == "out":
HT.set_beta_o(worker_values_list[worker_id])
elif mode == "att":
HT.set_beta_att(worker_values_list[worker_id])
elif mode == "pe":
HT.set_epsilon_pe(worker_values_list[worker_id])
else:
raise Exception("mode not recognized (not one of [\"betas\", \"out\", \"att\", \"pe\"])")
def runner(num_feat_patterns, seed, positional_embedding_size, context_size, ini_token_idx, worker_values_list,
worker_id, cfg, stats_to_save_plot, load_from_context_mode=0):
"""
:param load_from_context_mode: 0 -> don't load from context, 1 -> don't load from context but save your final context
2-> load context from other experiment
:return:
"""
vocab = Embedding(cfg["semantic_embedding_size"], positional_embedding_size)
# Seed equal to 0 for initial token set up
np.random.seed(0)
num_ini_tokens = 10 # Number of candidate initial tokens
ini_tokens_list = np.random.randint(2, size=(
num_ini_tokens, cfg["semantic_embedding_size"] + positional_embedding_size)) * 2 - 1
# Initialize positional embedding
ini_tokens_list[:, -positional_embedding_size:] = -1
min_saved_step = 0
if not cfg["save_non_transient"]:
min_saved_step = cfg["num_transient_steps"]
# Create root folder to later save and aggregate the results
folder_path = create_pathname(num_feat_patterns, positional_embedding_size, context_size, worker_values_list, load_from_context_mode, cfg)
folder_path_chpt = folder_path + "/chpt"
folder_path = folder_path + "/stats"
create_dir(folder_path)
if load_from_context_mode == 1:
create_dir(folder_path_chpt)
# Define the seed that will create the weights/correlations
np.random.seed(seed)
if cfg["inf_mode"]:
# Initialize the Hopfield Transformer class. \beta will be set afterwards
HT = HopfieldTransformerMFInfNPE(cfg["beta_o"], cfg["beta_att"], num_feat_patterns=num_feat_patterns,
positional_embedding_bitsize=positional_embedding_size, vocab=vocab,
context_size=context_size, max_sim_steps=cfg["max_sim_steps"],
min_saved_step=min_saved_step,
normalize_weights_str_att=cfg["normalize_weights_str_att"],
normalize_weights_str_o=cfg["normalize_weights_str_o"],
reorder_weights=cfg["reorder_weights"],
correlations_from_weights=cfg["correlations_from_weights"],
num_segments_corrs=cfg["num_segments_corrs"], pe_mode=cfg["pe_mode"],
semantic_embedding_bitsize=cfg["semantic_embedding_size"],
epsilon_pe=cfg["epsilon_pe"],
gaussian_scale_str=cfg["gaussian_scale"],
compute_inf_normalization=cfg["compute_inf_normalization"],
N_normalization=9999,
scaling_o=cfg["scaling_o"],
scaling_att=cfg["scaling_att"])
else:
HT = HopfieldTransformerMFPE(cfg["beta_o"], cfg["beta_att"], num_feat_patterns=num_feat_patterns,
embedding_size=cfg["semantic_embedding_size"] + positional_embedding_size,
vocab=vocab, context_size=context_size, max_sim_steps=cfg["max_sim_steps"],
min_saved_step=min_saved_step,
normalize_weights_str_att=cfg["normalize_weights_str_att"],
normalize_weights_str_o=cfg["normalize_weights_str_o"],
reorder_weights=cfg["reorder_weights"],
scaling_o=cfg["scaling_o"],
scaling_att=cfg["scaling_att"],
weights_from_segments=cfg["weights_from_segments"])
# Initialize structure for saving the results for each beta
results_beta = {}
for stat_name in HT.statistics_names:
results_beta[stat_name] = []
# Set either both betas, one of them or epsilon from the positional encoding
initialize_bifurcation_variable(HT, worker_values_list, worker_id, cfg["bifurcation_mode"])
print(f"Computing seed {seed} beta {worker_id + 1}/{len(worker_values_list)}", flush=True)
# Reset data structures
HT.reset_data()
# Define the initial token. x0 is only used if load_from_context_mode!=2
x0 = define_ini_token(cfg["ini_token_from_w"], HT, ini_token_idx, ini_tokens_list)
ini_token_from_w = cfg["ini_token_from_w"]
if ini_token_from_w != 0: # Otherwise it's already set
x0[-positional_embedding_size:] = -1 # Initialize position to -1
if load_from_context_mode == 0 or load_from_context_mode == 1:
# Simulate for max_sim_steps steps from x0
HT.simulate(x0, max_steps=cfg["max_sim_steps"])
if load_from_context_mode == 1:
# Save context reordered for a fresh start
HT.reorder_context_window()
cw = HT.return_context_window()
save_context(cw, folder_path_chpt, worker_id)
elif load_from_context_mode == 2:
# Load checkpoint from last beta
mv_window, mq_window, mk_window, att_window = load_context(folder_path_chpt, len(worker_values_list) - 1)
# Set context window to the checkpoint values
HT.set_context_window(mv_window, mq_window, mk_window, att_window)
# Simulate from context
HT.simulate_mf_from_context(max_steps=cfg["max_sim_steps"])
for stat_name in stats_to_save_plot:
# Accumulate results in a var of beta_list length
results_beta[stat_name] = np.copy(HT.mf_statistics[stat_name])
# Set up some more variables for saving purposes
ini_token_mode_str = ""
if ini_token_from_w != 0:
ini_token_mode_str = f"-ini_token_from_w-{ini_token_from_w}"
stats_data_path = (folder_path + "/seed-" + str(seed) + "-ini_token_idx-" + str(ini_token_idx)
+ ini_token_mode_str + "-beta_idx-" + str(worker_id) + ".npz")
# Save results
print("Saving results in ", os.path.abspath(stats_data_path))
np.savez_compressed(stats_data_path,
mo_results_beta=results_beta["mo"],
mo_se_results_beta=results_beta["mo_se"],
mv_results_beta=results_beta["mv"],
mq_results_beta=results_beta["mq"],
mk_results_beta=results_beta["mk"],
att_results_beta=results_beta["att"])
print(f"Saved stats num_feat_patterns {num_feat_patterns}, seed {seed}, ini_token_idx {ini_token_idx}")
def plotter(num_feat_patterns, seed, positional_embedding_size, context_size, ini_token_idx, worker_values_list, cfg,
stats_to_save_plot, load_from_context_mode=0, min_max_beta_to_show=None, show_title=False):
# Set up some parameters for loading the experiments statistics
if min_max_beta_to_show is None:
min_beta_idx = 0
max_beta_idx = None
else: # In this else, if set, we can zoom_in the bif. diagram but without much resolution
min_beta_idx = np.searchsorted(worker_values_list, min_max_beta_to_show[0])
max_beta_idx = np.searchsorted(worker_values_list, min_max_beta_to_show[1]) + 1
if cfg["save_non_transient"] == True:
num_transient_steps_plot_arg = cfg["num_transient_steps"]
else:
num_transient_steps_plot_arg = 0
# image_format = ".jpeg"
image_format = ".pdf"
# Create pathname
folder_path = create_pathname(num_feat_patterns, positional_embedding_size, context_size, worker_values_list,
load_from_context_mode, cfg)
# Create some more variables for saving purposes
ini_token_mode_str = ""
ini_token_from_w = cfg["ini_token_from_w"]
if ini_token_from_w != 0:
ini_token_mode_str = f"-ini_token_from_w-{ini_token_from_w}"
correlations_from_weights = cfg["correlations_from_weights"]
filtering_range = cfg["filtering_range"]
# Get the requested list of betas
filtered_beta_list = worker_values_list[min_beta_idx:max_beta_idx]
show_max_num_patterns = 6 # Just important if we are plotting more than 6 features at the same time
# If `show_1_feat` is defined it will only plot one feature at a time.
# The value of the list is the index of the feature to plot.
show_1_feat = [1, 0, 0]
# show_1_feat = [None, None, None]
# Load each stat and plot/save it
for stat_name in stats_to_save_plot:
# Create folder if it does not exist and we are saving the image
if cfg["save_not_plot"] and (not os.path.exists(folder_path + f"/{stat_name}/")):
os.makedirs(folder_path + f"/{stat_name}/")
# filter_idx defines what feature we are using for intersecting with 0.
for filter_idx in range(num_feat_patterns):
# Title for internal use
if show_title:
title = (
f"CORRm={correlations_from_weights} CTX={context_size} NUM_PAT={num_feat_patterns} "
f"SEED={seed} Filter={filtering_range}")
else:
title = None
# Save path
filtered_save_path = (folder_path + f"/{stat_name}/seed-" + str(seed) + "-ini_token_idx-" +
str(ini_token_idx) + "-transient_steps-" + str(cfg["num_transient_steps"]) + "-filter_idx-" + str(filter_idx) +
"-filter_rg-" + str(filtering_range) + image_format)
# Plotting and saving
print("Creating and saving diagram")
plot_filtered_bifurcation_diagram_par_imshow(filter_idx, filtered_beta_list, num_feat_patterns,
filtered_save_path, num_transient_steps_plot_arg,
stat_name, folder_path, seed, ini_token_idx,
ini_token_mode_str, filtering_range=filtering_range,
show_max_num_patterns=show_max_num_patterns,
save_not_plot=cfg["save_not_plot"], title=title,
show_1_feat=show_1_feat[filter_idx])
# For internal use mostly, to decide the final plots. Creates low resolution images of the planes.
plot_lowres_planes = False
if plot_lowres_planes:
for idx in range(len(filtered_beta_list)):
print(f"Plotting lowres planes for beta {idx + 1}/{len(filtered_beta_list)} ")
beta_idx = min_beta_idx + idx
stats_data_path = (folder_path + "/stats" + "/seed-" + str(seed) + "-ini_token_idx-"
+ str(ini_token_idx) + ini_token_mode_str + "-beta_idx-" + str(beta_idx)
+ ".npz")
# Load data
data = np.load(stats_data_path)
mo_se_results = data[f"mo_se_results_beta"]
# 3 feats
stats_to_plot = [["mo_se"], ["mo_se"]]
feat_idx = [[0], [1]]
plot_save_path_plane = (folder_path + f"/indiv_traj_lowres/seed-{str(seed)}/planes"
+ f"/plane-beta-{worker_values_list[beta_idx]}-ini_token_idx-" +
str(ini_token_idx) + "-transient_steps-" +
str(cfg["num_transient_steps"]) + image_format)
if cfg["save_not_plot"]:
create_dir_from_filepath(plot_save_path_plane)
stat_results_beta_list_0 = [mo_se_results]
stat_results_beta_list_1 = [mo_se_results]
plot_save_plane(stat_results_beta_list_0,
stat_results_beta_list_1, cfg["max_sim_steps"] - cfg["num_transient_steps"], feat_idx,
tag_names=stats_to_plot, save_path=plot_save_path_plane,
save_not_plot=cfg["save_not_plot"], lowres=True)
if __name__ == "__main__":
# Load cfg
cfg_path = 'cfgs/bif_diagram_inf_0.yaml'
with open(cfg_path, 'r') as file:
cfg = yaml.safe_load(file)
positional_embedding_size = 2
context_size = 2 ** positional_embedding_size
num_bifurcation_values = 4001 # Number of x values to examine in the bifurcation diagram
worker_values_list = np.linspace(cfg["min_bifurcation_value"], cfg["max_bifurcation_value"],
num_bifurcation_values) # Betas or Epsilon values
seed = 1 # List of seeds to review
num_feat_patterns = 3 # List of number of features for which to initialize the model
ini_token_idx = 0
load_from_last_chpt = True # Whether to first simulate the last beta and then simulate the rest from its final context.
show_title = False # Whether to plot a title with the characteristics of the experiment. For internal use mostly.
if context_size > 2 ** positional_embedding_size:
raise ("The positional embedding cannot cover the whole context size.")
if cfg["num_transient_steps"] > cfg["max_sim_steps"]:
raise ("You cannot discard more timesteps than you are simulating.")
stats_to_save_plot = ["mo_se"]
start = time.time()
# Compute the bifurcation diagrams
if not load_from_last_chpt:
for worker_id in range(num_bifurcation_values):
runner(num_feat_patterns, seed, positional_embedding_size, context_size, ini_token_idx, worker_values_list,
worker_id, cfg, stats_to_save_plot)
else:
# First compute the last beta
runner(num_feat_patterns, seed, positional_embedding_size, context_size, ini_token_idx, worker_values_list,
num_bifurcation_values - 1, cfg, stats_to_save_plot, load_from_context_mode=1)
# Then compute the rest of the betas, setting the initial context to the last beta one
for worker_id in range(num_bifurcation_values - 1):
runner(num_feat_patterns, seed, positional_embedding_size, context_size, ini_token_idx, worker_values_list,
worker_id, cfg, stats_to_save_plot, load_from_context_mode=2)
end = time.time()
elapsed_time = end - start
print("elapsed time in minutes", elapsed_time / 60)
print("elapsed time in hours", elapsed_time / 3600)
# Once computed, load checkpoints and plot them
if load_from_last_chpt:
load_from_context_mode = 1
else:
load_from_context_mode = 0
plotter(num_feat_patterns, seed, positional_embedding_size, context_size, ini_token_idx, worker_values_list, cfg,
stats_to_save_plot, load_from_context_mode=load_from_context_mode, show_title=show_title)