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find_age_correlated_fragments.py
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find_age_correlated_fragments.py
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from itertools import izip, permutations
import json
import pprint
import random
import re
import math
from scipy.stats.stats import pearsonr, spearmanr
from utils import *
TWIN_AGES = sorted(twin_age.values())
TWINS = sorted(twin_age, key = lambda x: twin_age[x])
TWIN_PAIR_AGES = [twin_age[t1] for t1, t2 in twinpairs]
#getvf = lambda data, s: [data[t][s] for t in TWINS]
getvf = lambda data, s: [round (data[t][s],22) for t in TWINS]
getvd = lambda data, s: [round(abs(data[t1][s] - data[t2][s]), 22) for t1, t2 in twinpairs]
#getvd = lambda data, s: [abs(data[t1][s] - data[t2][s]) for t1, t2 in twinpairs]
def gen_random_ages(ages = None):
random_ages = []
for i in range(10):
_x = twin_age.values() if ages is None else ages
random.shuffle(_x)
random_ages.append(_x)
return random_ages
def _pearsonr(values, mean_values, ages, mean_ages):
val_diffs = [v - mean_values for v in values]
age_diffs = [age - mean_ages for age in ages]
return float(sum(vald*aged for vald, aged in izip(val_diffs, age_diffs)))/math.sqrt(sum(vald*vald for vald in val_diffs)*sum(aged*aged for aged in age_diffs))
def _mono(values):
diff = []
for i in xrange(len(values)-1):
diff.append(values[i+1] - values[i])
if all(d > 0 for d in diff) or all(d < 0 for d in diff):
return sum(diff)
else:
return 0
def mono(sites, data, ages, deltas = False):
res = {}
random_ages = list(permutations(ages)) if deltas else gen_random_ages()
mean_ages = mean(ages)
for s in sites:
values = (getvd if deltas else getvf)(data, s)
if len(set(values)) == 1:
continue
res[s] = {}
res[s]['score'] = _mono(values)
res[s]['pval'] = 1
# res[s]['score'], res[s]['pval'] = pearsonr(values, ages)
# mean_values = mean(values)
# res[s]['score'], res[s]['pval'] = _pearsonr(values, mean_values, ages, mean_ages), 0
res[s]['data'] = json.dumps(values)
# res[s]['rscore'] = json.dumps([ _pearsonr(values, mean_values, rage, mean_ages) for rage in random_ages])
# rscores = [ pearsonr(values,rage) for rage in random_ages]
res[s]['rscore'] = [_mono(sorted(values))] #json.dumps([r[0] for r in rscores])
res[s]['rpvals'] = '' #json.dumps([r[1] for r in rscores])
return res
def cc(sites, data, ages, deltas = False):
res = {}
# random_ages = list(permutations(ages)) if deltas else gen_random_ages()
random_ages = gen_random_ages(ages)
# mean_ages = mean(ages)
for s in sites:
values = (getvd if deltas else getvf)(data, s)
if len(set(values)) == 1:
continue
if max(values) - min(values) < 0.1:
continue
res[s] = {}
res[s]['score'], res[s]['pval'] = pearsonr(values, ages)
# mean_values = mean(values)
# res[s]['score'], res[s]['pval'] = _pearsonr(values, mean_values, ages, mean_ages), 0
res[s]['data'] = json.dumps(values)
# res[s]['rscore'] = json.dumps([ _pearsonr(values, mean_values, rage, mean_ages) for rage in random_ages])
rscores = [ pearsonr(values,rage) for rage in random_ages]
res[s]['rscore'] = json.dumps([r[0] for r in rscores])
res[s]['rpvals'] = json.dumps([r[1] for r in rscores])
return res
def spearmanc(sites, data, ages, deltas = False):
res = {}
random_ages = list(permutations(ages)) if deltas else gen_random_ages()
for s in sites:
values = (getvd if deltas else getvf)(data, s)
if len(set(values)) == 1:
continue
res[s] = {}
res[s]['score'], res[s]['pval'] = spearmanr(values, ages)
res[s]['rscore'] = json.dumps([spearmanr(values, rage)[0] for rage in random_ages])
res[s]['data'] = json.dumps(values)
return res
def eucl(vector):
return math.sqrt(sum(v**2 for v in vector))
def _cosined(values, eucl_values, ages, eucl_ages):
return sum(v*a for v, a in izip(values, ages))/(eucl_values * eucl_ages)
def cosined(sites, data, ages, deltas = False):
res = {}
eucl_ages = eucl(ages)
random_ages = list(permutations(ages)) if deltas else gen_random_ages()
for s in sites:
values = (getvd if deltas else getvf)(data, s)
if all(v == 0 for v in values):
continue
res[s] = {}
eucl_values = eucl(values)
res[s]['score'] = _cosined(values, eucl_values, ages, eucl_ages)
rscores = [ _cosined(values, eucl_values, rage, eucl_ages) for rage in random_ages]
res[s]['pval'] = len(filter(lambda x: x >= res[s]['score'], rscores)) / float(len(random_ages))
# res[s]['rscore'] = sum(rscores)/ float(len(random_ages))
res[s]['rscore'] = json.dumps(rscores)
res[s]['data'] = json.dumps(values)
return res
def mean(array):
return float(sum(array))/len(array)
def _dotprod(values, mean_values, ages, mean_ages):
return sum((val - mean_values) * (age - mean_ages) for val, age in izip(values, ages))
def dotprod(sites, data, ages, deltas = False):
res = {}
mean_ages = mean(ages)
random_ages = list(permutations(ages)) if deltas else gen_random_ages()
rpvals = [float(i)/120 for i in xrange(1,121)]
for s in sites:
values = (getvd if deltas else getvf)(data, s)
if all(v == 0 for v in values):
continue
res[s] = {}
mean_values = mean(values)
res[s]['score'] = _dotprod(values, mean_values, ages, mean_ages)
rscores = [ _dotprod(values, mean_values, rage, mean_ages) for rage in random_ages]
res[s]['pval'] = len(filter(lambda x: x >= res[s]['score'], rscores)) / float(len(random_ages))
# res[s]['rscore'] = sum(rscores)/ float(len(random_ages))
res[s]['rscore'] = '' #json.dumps(rscores)
res[s]['rpvals'] = '' # json.dumps(rpvals)
res[s]['data'] = json.dumps(values)
return res
def FDR(res, alpha = 0.05):
pval = -1
for i, s in enumerate(sorted(res, key = lambda k: res[k]['pval'])):
# if i < 10:
# print i,s, pprint.pformat(res[s])
if res[s]['pval'] <= (i+1)*alpha/len(res):
pval = res[s]['pval']
# else:
# break
return pval
if __name__ == '__main__':
DATA_DIR = os.path.join(os.getcwd(), 'data')
anno = {}
for l in open(os.path.join(ANNO_DIR,'RRBS_mapable_regions.info.annotated')):
_, regId, _, _, regAnno = l.split('\t')
anno[int(regId)] = regAnno.strip()
elapsed('annotation')
sites = None
data = {}
for twin_id in datafiles:
fname = reg_fname(twin_id)
cdata = {}
print fname
current_sites = set()
for l in open(fname):
chrNo, regId, start, end, regSites, methLevel = filter(None,re.split(r'\s+',l))
regId = int(regId)
current_sites.add(regId)
cdata[regId] = float(methLevel)
sites = current_sites if sites is None else sites & current_sites
data[twin_id] = cdata
print len(current_sites), len(sites)
elapsed('reading data')
sites = sorted(sites)
# res = pearsonr_on_individual_fragment_deltas(sites, data)
# method = dotprod_on_individual_fragments
method = cc
deltas = True
alpha = 0.15
# method = pearsonr_on_individual_fragments
# method = pearsonr_on_individual_fragments_minus_means
res = method(sites, data, TWIN_PAIR_AGES if deltas else TWIN_AGES, deltas = deltas)
# fdr = FDR(res, alpha=0.37)
fdr = FDR(res, alpha = alpha)
fdr = 1
print fdr
elapsed('calculating scores')
print 'Accepted:', len([s for s in sorted(res, key = lambda k: res[k]['score'], reverse = True) if res[s].get('pval', -1) <= fdr])
out = open(outd('%s_%s_%.2lf.out' % ('deltas' if deltas else 'fragments', method.func_name, alpha)), 'w')
out.write("#fragment\tscore\tp-value\trscore\tdata\tannotation\n")
for s in sorted(res, key = lambda k: res[k]['score'], reverse = True):
if res[s].get('pval', -1) <= fdr:
out.write("%d\t%f\t%f\t%s\t%s\t%s\t%s\n" % (s, res[s]['score'], res[s].get('pval', -1), res[s]['rscore'],res[s].get('rpvals',''), res[s]['data'], anno[s]))
out.close()
elapsed('real data')
# rtimes = 1
# raccepted = 0
# rage = list(reversed(TWIN_PAIR_AGES if deltas else TWIN_AGES))
#
# for rs in xrange(rtimes):
## random.shuffle(rage)
# res = method(sites, data, rage, deltas = deltas)
# fdr = 1
#
#
# out = open(os.path.join(DATA_DIR, '%s_%s_%.2lf.random_out' % ('deltas' if deltas else 'fragments', method.func_name, alpha)), 'w')
# out.write("#fragment\tscore\tp-value\tdata\tannotation\n")
#
# for s in sorted(res, key = lambda k: res[k]['score'], reverse = True):
# if res[s].get('pval', -1) <= fdr:
# out.write("%d\t%f\t%f\t%s\t%s\n" % (s, res[s]['score'], res[s].get('pval', -1), res[s]['data'], anno[s]))
# out.close()
#
# fdr = FDR(res, alpha = alpha)
# print pprint.pformat([s for s in sorted(res, key = lambda k: res[k]['score'], reverse = True) if res[s].get('pval', -1) <= fdr][:10])
# print 'random fdr:', fdr
# _raccepted = len([s for s in sorted(res, key = lambda k: res[k]['score'], reverse = True) if res[s].get('pval', -1) <= fdr])
# print '_raccepted:', _raccepted, '\n\n'
# raccepted += _raccepted
# print "Random: ", float(raccepted)/rtimes
elapsed('%s_%s.out' % (method.func_name, 'deltas' if deltas else 'fragments'))