def rank_info(relative_ranks, method, seed, ratio, debug=False, delim=' '):
return delim.join([
RANK_STR, method,
str(seed), '{:g}'.format(ratio),
float2str(non_nan_mean(relative_ranks)),
delim.join(map(str, relative_ranks)) if not debug else ''
])
def result_info(metric,
results,
method,
seed,
ratio,
k_eval,
debug=False,
delim=' '):
return delim.join([
metric, method,
str(seed), '{:g}'.format(ratio),
str(k_eval),
float2str(non_nan_mean(results)),
delim.join(map(float2str, results)) if not debug else ''
])
def main():
print 'Calculating evaluation metrics from the predictions...'
config_file = sys.argv[1]
with open(config_file, 'r') as f:
config = yaml.load(f)
analysis = config['analysis']
assert analysis in [FULL, SAMPLE, KEEPK], 'Unknown analysis type {} specified in the config file'.format(analysis)
data_name = config['data']
assert data_name in [GEX, WES, CNV, METH], 'Unknown data type {} specified in the config file'.format(data_name)
methods = config['methods']
for method in methods:
assert method in [KRL, LKRL, KBMTL, KRR, RF, EN], 'Unknown method {} specified in the config file'.format(method)
num_folds = config['cv']
seeds = np.array(config['seeds'], dtype=int)
sample_ratios = np.array(config['sample_ratios'], dtype=float)
keepk_ratios = np.array(config['keepk_ratios'], dtype=float)
keepk = config['keepk']
k_evals = np.array(config['k_evals'], dtype=int)
krl_k = config['krl_k']
krl_lambdas = np.array(config['krl_lambdas'], dtype=float)
krl_gammas = np.array(config['krl_gammas'], dtype=float)
lkrl_k = config['lkrl_k']
lkrl_lambdas = np.array(config['lkrl_lambdas'], dtype=float)
kbmtl_alphas = np.array(config['kbmtl_alphas'], dtype=float)
kbmtl_betas = np.array(config['kbmtl_betas'], dtype=float)
kbmtl_gammas = np.array(config['kbmtl_gammas'], dtype=float)
debug = False
foldwise = analysis == FULL
ratio_range = sample_ratios if analysis == SAMPLE else keepk_ratios
cv_metric = NDCG
single_cv_k = False
k_percs = [1]
k_opt = keepk if analysis == KEEPK and krl_k > keepk else krl_k
cv_ks = set(list(k_evals) + [k_opt])
rank_type = 'best_prediction'
rank = True
perc = True
for seed in seeds:
for ratio in ratio_range:
abs_ranks, relative_ranks = {}, {}
for method in methods:
abs_ranks[method], relative_ranks[method] = [], []
foldwise_ndcgk = {}
foldwise_precisionk = {}
percentiles = {}
for fold1 in range(num_folds):
try:
results = get_result(method, analysis, data_name, fold1, num_folds, keepk, ratio, seed, cv_metric, cv_ks, krl_lambdas, krl_gammas, lkrl_lambdas, kbmtl_alphas, kbmtl_betas, kbmtl_gammas)
except Exception as e:
results = None
print >> sys.stderr, 'ERROR:', method, analysis, data_name, fold1, keepk, ratio, seed, cv_metric, cv_ks
traceback.print_exc()
break # if any of the folds is missing, there is no point to continue
for k in k_evals:
Y_true = results[k]['Y_true'] if not single_cv_k else results[iter(cv_ks).next()]['Y_true']
Y_pred = results[k]['Y_pred'] if not single_cv_k else results[iter(cv_ks).next()]['Y_pred']
if k not in foldwise_ndcgk: foldwise_ndcgk[k] = []
if k not in foldwise_precisionk: foldwise_precisionk[k] = []
foldwise_ndcgk[k].append(NDCG(Y_true, Y_pred, k))
foldwise_precisionk[k].append(Precision(Y_true, Y_pred, k))
for k in k_percs:
# do not re-optimise hyper-parameters for every k_perc, use args.k_opt
Y_true = results[k_opt]['Y_true'] if not single_cv_k else results[iter(cv_ks).next()]['Y_true']
Y_pred = results[k_opt]['Y_pred'] if not single_cv_k else results[iter(cv_ks).next()]['Y_pred']
if k not in percentiles: percentiles[k] = []
percentiles[k].extend(Percentile(Y_true, Y_pred, k))
# do not re-optimise hyper-parameters for method ranking, use args.k_opt
Y_true = results[k_opt]['Y_true'] if not single_cv_k else results[iter(cv_ks).next()]['Y_true']
Y_pred = results[k_opt]['Y_pred'] if not single_cv_k else results[iter(cv_ks).next()]['Y_pred']
abs_ranks[method].extend(Rank(Y_true, Y_pred, rank_type))
if results is None:
del abs_ranks[method]
del relative_ranks[method]
print >> sys.stderr, 'SKIPPING method {}, ratio {:g}, seed {}'.format(method, ratio, seed)
continue # some of the folds were missing, continue with the next method
for k in k_evals:
if foldwise:
ndcg_result = [non_nan_mean(fold) for fold in foldwise_ndcgk[k]]
precision_result = [non_nan_mean(fold) for fold in foldwise_precisionk[k]]
else:
ndcg_result = list(itertools.chain.from_iterable(foldwise_ndcgk[k]))
precision_result = list(itertools.chain.from_iterable(foldwise_precisionk[k]))
print ndcg_info(ndcg_result, method, seed, ratio, k, debug=debug, delim=DELIM)
print precision_info(precision_result, method, seed, ratio, k, debug=debug, delim=DELIM)
if perc:
for k in k_percs:
for p_tuple in percentiles[k]:
assert len(p_tuple) == k
for i, p in enumerate(p_tuple):
print percentile_info(p, i, method, seed, ratio, k, delim=DELIM)
if debug:
print '...'
break
if rank and len(abs_ranks) > 0:
size = len(abs_ranks.itervalues().next())
assert np.all([size == len(abs_ranks[method]) for method in abs_ranks.keys()])
for i in range(size):
this_patient = sorted([abs_ranks[method][i] for method in abs_ranks.keys()])
for method in abs_ranks.keys():
relative_ranks[method].append(this_patient.index(abs_ranks[method][i]) + 1)
for method in abs_ranks.keys():
print rank_info(relative_ranks[method], method, seed, ratio, debug=debug, delim=DELIM)
print 'Finished.'
def update_metric(current_value, result, cv_metric, cv_k):
return (current_value + non_nan_mean(cv_metric(result['Y_true'], result['Y_pred'], cv_k))) \
if result is not None and ~np.isnan(current_value) else np.nan
