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Write exposure windows sequentially

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Jiarui Li
2026-07-08 13:04:32 +08:00
parent 14eccc91f9
commit efba7ac306
2 changed files with 48 additions and 20 deletions
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49
prepare_exposure_cache.py
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@@ -12,13 +12,17 @@ The output directory contains:
exposure_token.npy int32 raw disease token per real disease event
exposure_age_days.npy int32 age in days per real disease event
exposure_onset_date.npy datetime64[D] onset date per real disease event
exposure_row_index.npy int64 window row per real disease event, -1 if missing
exposure_eid_index.npy int64 unique eids in cache order
exposure_eid_start.npy int64 start offsets, length len(eid_index) + 1
exposure_daily.npy float32 memmap, shape (N, 1826, 4)
exposure_daily.npy float32 memmap, capacity (N, 1826, 4);
first M rows are sequential matched windows
channels: tmean, tmax, tmin, rhmean
exposure_monthly.npy float32 memmap, shape (N, 241, 2)
exposure_monthly.npy float32 memmap, capacity (N, 241, 2);
first M rows are sequential matched windows
channels: tmean, rhmean
exposure_quality.npy float32 memmap, shape (N, 4)
exposure_quality.npy float32 memmap, capacity (N, 4);
first M rows are matched-window quality stats
n_days, n_rh_days, n_months, n_rh_months
exposure_manifest.json metadata
@@ -265,6 +269,7 @@ def build_exposure_cache(
output_dir / "exposure_token.npy",
output_dir / "exposure_age_days.npy",
output_dir / "exposure_onset_date.npy",
output_dir / "exposure_row_index.npy",
output_dir / "exposure_eid_index.npy",
output_dir / "exposure_eid_start.npy",
output_dir / "exposure_daily.npy",
@@ -305,6 +310,7 @@ def build_exposure_cache(
token_path = output_dir / "exposure_token.npy"
age_path = output_dir / "exposure_age_days.npy"
onset_date_path = output_dir / "exposure_onset_date.npy"
row_index_path = output_dir / "exposure_row_index.npy"
daily_path = output_dir / "exposure_daily.npy"
monthly_path = output_dir / "exposure_monthly.npy"
quality_path = output_dir / "exposure_quality.npy"
@@ -318,6 +324,13 @@ def build_exposure_cache(
sequence_rows["onset_date"].to_numpy(dtype="datetime64[D]"),
)
_write_eid_offsets(sequence_rows, output_dir)
row_index_mm = np.lib.format.open_memmap(
row_index_path,
mode="w+",
dtype=np.int64,
shape=(n_rows,),
)
row_index_mm[:] = -1
daily_mm = np.lib.format.open_memmap(
daily_path,
@@ -337,9 +350,6 @@ def build_exposure_cache(
dtype=np.float32,
shape=(n_rows, len(QUALITY_COLUMNS)),
)
daily_mm[:] = np.nan
monthly_mm[:] = np.nan
quality_mm[:] = np.nan
daily_cols = _daily_columns()
monthly_cols = _monthly_columns()
@@ -347,7 +357,7 @@ def build_exposure_cache(
int(token): frame.reset_index(drop=True)
for token, frame in sequence_rows.groupby("token", sort=False)
}
matched = np.zeros(n_rows, dtype=bool)
write_offset = 0
iterator = tqdm(
summary.itertuples(index=False),
@@ -393,24 +403,28 @@ def build_exposure_cache(
daily_df = daily_df.set_index("position").loc[common_positions].reset_index()
monthly_df = monthly_df.set_index("position").loc[common_positions].reset_index()
positions = common_positions.astype(np.int64)
daily_mm[positions] = _reshape_window(
n_match = len(positions)
end_offset = write_offset + n_match
daily_mm[write_offset:end_offset] = _reshape_window(
daily_df,
daily_cols,
DAILY_LENGTH,
len(DAILY_CHANNELS),
)
monthly_mm[positions] = _reshape_window(
monthly_mm[write_offset:end_offset] = _reshape_window(
monthly_df,
monthly_cols,
MONTHLY_LENGTH,
len(MONTHLY_CHANNELS),
)
quality_mm[positions, 0] = daily_df.get("n_days_nonmissing", np.nan)
quality_mm[positions, 1] = daily_df.get("n_rh_days_nonmissing", np.nan)
quality_mm[positions, 2] = monthly_df.get("n_months_nonmissing", np.nan)
quality_mm[positions, 3] = monthly_df.get("n_rh_months_nonmissing", np.nan)
matched[positions] = True
quality_mm[write_offset:end_offset, 0] = daily_df.get("n_days_nonmissing", np.nan)
quality_mm[write_offset:end_offset, 1] = daily_df.get("n_rh_days_nonmissing", np.nan)
quality_mm[write_offset:end_offset, 2] = monthly_df.get("n_months_nonmissing", np.nan)
quality_mm[write_offset:end_offset, 3] = monthly_df.get("n_rh_months_nonmissing", np.nan)
row_index_mm[positions] = np.arange(write_offset, end_offset, dtype=np.int64)
write_offset = end_offset
row_index_mm.flush()
daily_mm.flush()
monthly_mm.flush()
quality_mm.flush()
@@ -421,13 +435,16 @@ def build_exposure_cache(
"data_prefix": data_prefix,
"labels_file": str(Path(labels_file).resolve()),
"n_rows": int(n_rows),
"matched_rows": int(matched.sum()),
"missing_rows": int((~matched).sum()),
"window_capacity_rows": int(n_rows),
"matched_rows": int(write_offset),
"missing_rows": int(n_rows - write_offset),
"alignment_key": "(eid, raw_token, date_of_birth + age_days)",
"requires_basic_info_column": "date_of_birth",
"daily_shape": [int(n_rows), DAILY_LENGTH, len(DAILY_CHANNELS)],
"active_daily_shape": [int(write_offset), DAILY_LENGTH, len(DAILY_CHANNELS)],
"daily_channels": list(DAILY_CHANNELS),
"monthly_shape": [int(n_rows), MONTHLY_LENGTH, len(MONTHLY_CHANNELS)],
"active_monthly_shape": [int(write_offset), MONTHLY_LENGTH, len(MONTHLY_CHANNELS)],
"monthly_channels": list(MONTHLY_CHANNELS),
"quality_columns": list(QUALITY_COLUMNS),
"raw_token_convention": "padding=0, checkup=1, labels.csv first row token=2",