def getBayesModel(G, p, mixPrior=None):
"""
Constructs a PWM CSI BayesMixtureModel.
@param G: number of components
@param p: number of positions of the binding site
@return: BayesMixtureModel object
"""
if not mixPrior:
piPrior = mixture.DirichletPrior(G, [1.0] * G)
compPrior = []
for i in range(p):
compPrior.append(
mixture.DirichletPrior(4, [1.02, 1.02, 1.02, 1.02]))
# arbitrary values of struct and comp parameters. Values should be
# reset by user using the structPriorHeuristic method.
mixPrior = mixture.MixtureModelPrior(0.05, 0.05, piPrior, compPrior)
DNA = mixture.Alphabet(['A', 'C', 'G', 'T'])
comps = []
for i in range(G):
dlist = []
for j in range(p):
phi = mixture.random_vector(4)
dlist.append(mixture.DiscreteDistribution(4, phi, DNA))
comps.append(mixture.ProductDistribution(dlist))
pi = mixture.random_vector(G)
m = mixture.BayesMixtureModel(G, pi, comps, mixPrior, struct=1)
return m
def readUCSCPrior(filename):
"""
Reads files in the UCSC Dirichlet Mixture prior (DMP) format (http://www.soe.ucsc.edu/compbio/dirichlets/)
and converts them into PyMix DirichletMixturePrior objects.
Note that the alphabet in the UCSC priors does not contain the gap symbol. For the output DirichletMixturePrior
the gap symbol is introduced with a parameter value of 0.01 in all components.
@param filename: file in UCSC DMP format
@return: DirichletMixturePrior object
"""
f = open(filename,'r')
ex1 = re.compile('Mixture=\s(\d+.\d+)')
ex2 = re.compile('Order\s*=\s+([A-Z\s]+)')
ex3 = re.compile('Alpha=\s+([\d+.\d+\s+,\d+e-]+)')
pi = []
sigma = None
dComp = []
alpha_mat = []
for l in f:
l = mixture.chomp(l)
m1 = ex1.match(l)
if m1:
pi.append( float(m1.groups(1)[0]))
m2 = ex2.match(l)
if m2:
s = m2.groups(1)[0]
sigma = s.split(' ')
m3 = ex3.match(l)
if m3:
s = m3.groups(1)[0]
alpha = s.split(' ')
alpha = map(float,alpha)
as = alpha.pop(0) # first entry is the sum of the others -> remove
alpha_mat.append(alpha)
# intergrate gap character '-' into the alphabet
sigma.append('-')
alphabet = mixture.Alphabet(sigma)
for i in range(len(alpha_mat)):
alpha_mat[i].append(0.01) # add hyper paramerter for '-'
dComp.append( mixture.DirichletPrior(21,alpha_mat[i]) )
prior = mixture.DirichletMixturePrior(len(dComp),21,pi,dComp)
return alphabet,prior
def scanSequence(mix, bg, seq,scoring='mix'):
"""
Scores all positions of a sequence with the given model and background.
@param mix: MixtureModel object
@param bg: background MixtureModel object
@param seq: sequence as list of nucleotides
@param scoring: flag to determine the scoring scheme used for the mixtures.
'compmax' means maximum density over the components, 'mix' means true mixture density
@return: list of position-wise log-odd scores
"""
# convert sequence to internal representation, alphabet of seq must be DNA
alph = mixture.Alphabet(['A','C','G','T'])
f = lambda x: alph.internal(x)
seq=map(f,seq)
dnr = mix.components[0].dist_nr
# init with dummy value at first position
s = numarray.array([[-1]+ seq[0:dnr-1]])
score = []
for i in range(dnr-1,len(seq),1):
# shift query sequence by one position
s[0] = numarray.concatenate( [s[0][1:],numarray.array([seq[i]])],0)
if scoring == 'compmax':
# score as maximum over components
c_m_l = numarray.zeros(mix.G,numarray.Float)
for i in range(mix.G):
c_m_l[i] = mix.components[i].pdf(s)[0]
m_l = c_m_l.max()
elif scoring == 'mix':
m_l = mix.pdf(s)[0]
bg_l = bg.pdf(s)[0]
score.append(m_l-bg_l)
return score
def getModel(G, p):
"""
Constructs a PWM MixtureModel.
@param G: number of components
@param p: number of positions of the binding site
@return: MixtureModel object
"""
DNA = mixture.Alphabet(['A', 'C', 'G', 'T'])
comps = []
for i in range(G):
dlist = []
for j in range(p):
phi = mixture.random_vector(4)
dlist.append(mixture.DiscreteDistribution(4, phi, DNA))
comps.append(mixture.ProductDistribution(dlist))
pi = mixture.random_vector(G)
m = mixture.MixtureModel(G, pi, comps)
return m
def setUp(self):
# building generating models
self.DIAG = mixture.Alphabet(['.', '0', '8', '1'])
A = [[0.3, 0.6, 0.1], [0.0, 0.5, 0.5], [0.4, 0.2, 0.4]]
B = [[0.5, 0.2, 0.1, 0.2], [0.5, 0.4, 0.05, 0.05],
[0.8, 0.1, 0.05, 0.05]]
pi = [1.0, 0.0, 0.0]
self.h1 = mixtureHMM.getHMM(
mixtureHMM.ghmm.IntegerRange(0, 4),
mixtureHMM.ghmm.DiscreteDistribution(
mixtureHMM.ghmm.IntegerRange(0, 4)), A, B, pi)
A2 = [[0.5, 0.4, 0.1], [0.3, 0.2, 0.5], [0.3, 0.2, 0.5]]
B2 = [[0.1, 0.1, 0.4, 0.4], [0.1, 0.1, 0.4, 0.5], [0.2, 0.2, 0.3, 0.3]]
pi2 = [0.6, 0.4, 0.0]
self.h2 = mixtureHMM.getHMM(
mixtureHMM.ghmm.IntegerRange(0, 4),
mixtureHMM.ghmm.DiscreteDistribution(
mixtureHMM.ghmm.IntegerRange(0, 4)), A2, B2, pi2)
n1 = mixture.NormalDistribution(2.5, 0.5)
n2 = mixture.NormalDistribution(6.0, 0.8)
mult1 = mixture.MultinomialDistribution(3,
4, [0.23, 0.26, 0.26, 0.25],
alphabet=self.DIAG)
mult2 = mixture.MultinomialDistribution(3,
4, [0.7, 0.1, 0.1, 0.1],
alphabet=self.DIAG)
c1 = mixture.ProductDistribution([n1, mult1, self.h1])
c2 = mixture.ProductDistribution([n2, mult2, self.h2])
mpi = [0.4, 0.6]
self.m = mixture.MixtureModel(2, mpi, [c1, c2])
# mixture for sampling
gc1 = mixture.ProductDistribution([n1, mult1])
gc2 = mixture.ProductDistribution([n2, mult2])
self.gen = mixture.MixtureModel(2, mpi, [gc1, gc2])
def getBackgroundModel(p, dist=None):
"""
Construct background model
@param p: number of positions of the binding site
@param dist: background nucleotide frequencies, uniform is default
@return: MixtureModel representing the background
"""
DNA = mixture.Alphabet(['A', 'C', 'G', 'T'])
dlist = []
if dist == None:
phi = [0.25] * 4
else:
phi = dist
for j in range(p):
dlist.append(mixture.DiscreteDistribution(4, phi, DNA))
comps = [mixture.ProductDistribution(dlist)]
m = mixture.MixtureModel(1, [1.0], comps)
return m
import mixture
import random
VNTR = mixture.Alphabet([
'.', '2/4', '2/7', '3/4', '3/7', '4/4', '4/6', '4/7', '4/8', '4/9', '7/7'
])
DIAG = mixture.Alphabet(['.', '0', '8', '1'])
data = mixture.DataSet()
# iq.txt = iq and achievement test fields from pheno.txt
# drd4_len.txt = drd4 vntr types, only number of repeats
data.fromFiles(["filt_WISC_WIAT_DISC_134.txt"]) # ,"DRD4_134_len.txt"
m = mixture.readMixture('pheno_best.py')
print "Without deterministic anealing:"
m.randMaxEM(data, 100, 30, 0.1, tilt=0, silent=0)
print "\nWith deterministic annealing:"
m.randMaxEM(data, 100, 30, 0.1, tilt=1, silent=0)
import mixture
import numpy
import random
import mixtureHMM
# building generating models
DIAG = mixture.Alphabet(['.', '0', '8', '1'])
A = [[0.3, 0.6, 0.1], [0.0, 0.5, 0.5], [0.4, 0.2, 0.4]]
B = [[0.5, 0.2, 0.1, 0.2], [0.5, 0.4, 0.05, 0.05], [0.8, 0.1, 0.05, 0.05]]
pi = [1.0, 0.0, 0.0]
h1 = mixtureHMM.getHMM(
mixtureHMM.ghmm.IntegerRange(0, 4),
mixtureHMM.ghmm.DiscreteDistribution(mixtureHMM.ghmm.IntegerRange(0, 4)),
A, B, pi)
#seq = h1.hmm.sample(10,50)
#print seq
A2 = [[0.5, 0.4, 0.1], [0.3, 0.2, 0.5], [0.3, 0.2, 0.5]]
B2 = [[0.1, 0.1, 0.4, 0.4], [0.1, 0.1, 0.4, 0.5], [0.2, 0.2, 0.3, 0.3]]
pi2 = [0.6, 0.4, 0.0]
h2 = mixtureHMM.getHMM(
mixtureHMM.ghmm.IntegerRange(0, 4),
mixtureHMM.ghmm.DiscreteDistribution(mixtureHMM.ghmm.IntegerRange(0, 4)),
A2, B2, pi2)
n1 = mixture.NormalDistribution(2.5, 0.5)
n2 = mixture.NormalDistribution(6.0, 0.8)
mult1 = mixture.MultinomialDistribution(3,
#-----------------------------------------------------------------------------------
G = 3
p = 4
# Bayesian Mixture with three components and four discrete features
piPrior = mixture.DirichletDistribution(G,[1.0]*G)
compPrior= []
for i in range(2):
compPrior.append( mixture.DirichletDistribution(4,[1.02,1.02,1.02,1.02]) )
for i in range(2):
compPrior.append( mixture.NormalGammaDistribution( 1.0,2.0,3.0,4.0 ) )
mixPrior = mixture.MixturePrior(0.7,0.7,piPrior, compPrior)
DNA = mixture.Alphabet(['A','C','G','T'])
comps = []
for i in range(G):
dlist = []
for j in range(2):
phi = mixture.random_vector(4)
dlist.append( mixture.DiscreteDistribution(4,phi,DNA))
for j in range(2):
mu = j+1.0
sigma = j+0.5
dlist.append( mixture.NormalDistribution(mu,sigma))
comps.append(mixture.ProductDistribution(dlist))
pi = mixture.random_vector(G)
def main():
logger.debug('App started')
parser = argparse.ArgumentParser(description='Key processing tool')
parser.add_argument('-t',
'--threads',
dest='threads',
type=int,
default=None,
help='Number of threads to use for cert download')
parser.add_argument('--debug',
dest='debug',
action='store_const',
const=True,
help='enables debug mode')
parser.add_argument('--verbose',
dest='verbose',
action='store_const',
const=True,
help='enables verbose mode')
parser.add_argument('--dump-json',
dest='dump_json',
action='store_const',
const=True,
help='dumps JSON of the filtered certificates')
parser.add_argument('--dump-cert',
dest='dump_cert',
action='store_const',
const=True,
help='dumps PEM of the filtered certificates')
parser.add_argument(
'-f',
'--filter-org',
dest='filter_org',
help='Filter out certificates issued with given organization - regex')
parser.add_argument(
'--filter-domain',
dest='filter_domain',
help='Filter out certificates issued for the given domain - regex')
parser.add_argument('--pubs',
dest='pubs',
nargs=argparse.ZERO_OR_MORE,
help='File with public keys (PEM)')
parser.add_argument('--certs',
dest='certs',
nargs=argparse.ZERO_OR_MORE,
help='File with certificates (PEM)')
parser.add_argument('--ossl',
dest='ossl',
type=int,
default=None,
help='OpenSSL generator')
parser.add_argument('--per-key-stat',
dest='per_key_stat',
action='store_const',
const=True,
help='Print prob matching for each key')
parser.add_argument('--subs',
dest='subs',
action='store_const',
const=True,
help='Plot random subgroups charts')
parser.add_argument('--subs-k',
dest='subs_k',
type=int,
default=5,
help='Size of the subset')
parser.add_argument('--subs-n',
dest='subs_n',
type=int,
default=1000,
help='Number of subsets to sample')
parser.add_argument('--pca-src',
dest='pca_src',
action='store_const',
const=True,
help='Plot PCA sampled distribution vs collected one')
parser.add_argument(
'--pca-src-n',
dest='pca_src_n',
type=int,
default=10000,
help='Number of subsets to sample from source distributions')
parser.add_argument('--pca-src-k',
dest='pca_src_k',
type=int,
default=3,
help='Size of the subset from the source distribution')
parser.add_argument('--pca-grp',
dest='pca_grp',
action='store_const',
const=True,
help='Plot PCA on the input keys (groups)')
parser.add_argument('--mixture',
dest='mixture',
action='store_const',
const=True,
help='Mixture distribution on masks - sources')
parser.add_argument('--distrib',
dest='distrib',
action='store_const',
const=True,
help='Plot distributions - to the PDF')
parser.add_argument('--distrib-mix',
dest='distribmix',
action='store_const',
const=True,
help='Plot distributions groups mixed with sources')
parser.add_argument('--key-dist',
dest='plot_key_dist',
action='store_const',
const=True,
help='Plots key mask distribution')
parser.add_argument('files',
nargs=argparse.ZERO_OR_MORE,
default=[],
help='file with ssl-dump json output')
args = parser.parse_args()
last_src_id = 0
src_names = []
masks_db = []
masks_src = []
cert_db = []
keys_db = []
# Input = ssl-dump output
if len(args.files) > 0:
# Cert Organization Filtering
re_org = None if args.filter_org is None else re.compile(
args.filter_org, re.IGNORECASE)
# Domain filtering
re_dom = None if args.filter_domain is None else re.compile(
args.filter_domain, re.IGNORECASE)
# Process files
for fl in args.files:
with open(fl, mode='r') as fh:
data = fh.read()
# Parse json out
if '-----BEGIN JSON-----' in data:
if '-----END JSON-----' not in data:
raise ValueError('BEGIN JSON present but END JSON not')
match = re.search(
r'-----BEGIN JSON-----(.+?)-----END JSON-----', data,
re.MULTILINE | re.DOTALL)
if match is None:
raise ValueError('Could not extract JSON')
data = match.group(1)
json_data = json.loads(data)
for cert in json_data:
org = cert['org']
if org is None:
org = ''
if re_org is not None and re_org.match(org) is None:
if args.verbose:
print('Organization filtered out %s' % org)
continue
if re_dom is not None:
dom_match = re_dom.match(cert['cn']) is not None
for alt in cert['alts']:
dom_match |= re_dom.match(alt) is not None
if not dom_match:
if args.verbose:
print('Domain filtered out %s' % cert['cn'])
continue
cert_db.append(cert)
masks_db.append(cert['pubkey']['mask'])
masks_src.append(last_src_id)
src_names.append(fl)
last_src_id += 1
if args.verbose:
print('Certificate database size %d' % len(cert_db))
if args.dump_json:
print(json.dumps(cert_db))
if args.dump_cert:
for cert in cert_db:
print cert['cert']
# public key list processing
if args.pubs is not None:
for pubf in args.pubs:
with open(pubf, mode='r') as fh:
data = fh.read()
keys = []
for match in re.finditer(
r'-----BEGIN PUBLIC KEY-----(.+?)-----END PUBLIC KEY-----',
data, re.MULTILINE | re.DOTALL):
key = match.group(0)
keys.append(key)
print('File %s keys num: %d' % (pubf, len(keys)))
# pubkey -> mask
for key in keys:
pub = serialization.load_pem_public_key(
key, utils.get_backend())
mask = keys_basic.compute_key_mask(pub.public_numbers().n)
keys_db.append(pub)
masks_db.append(mask)
masks_src.append(last_src_id)
src_names.append(pubf)
last_src_id += 1
# extract public key from certificate
if args.certs is not None:
for certf in args.certs:
with open(certf, mode='r') as fh:
data = fh.read()
certs = []
for match in re.finditer(
r'-----BEGIN CERTIFICATE-----(.+?)-----END CERTIFICATE-----',
data, re.MULTILINE | re.DOTALL):
cert = match.group(0)
certs.append(cert)
# cert -> mask
for cert in certs:
x509 = utils.load_x509(str(cert))
pub = x509.public_key()
mask = keys_basic.compute_key_mask(pub.public_numbers().n)
keys_db.append(pub)
masks_db.append(mask)
masks_src.append(last_src_id)
src_names.append(certf)
last_src_id += 1
# generate openssl keys on the fly
if args.ossl is not None:
for i in range(0, args.ossl):
print('Generating RSA1024 key %03d' % i)
key = OpenSSL.crypto.PKey()
key.generate_key(OpenSSL.crypto.TYPE_RSA, 1024)
key_pem = OpenSSL.crypto.dump_privatekey(
OpenSSL.crypto.FILETYPE_PEM, key)
priv = serialization.load_pem_private_key(key_pem, None,
utils.get_backend())
mask = keys_basic.compute_key_mask(
priv.public_key().public_numbers().n)
keys_db.append(priv.public_key())
masks_db.append(mask)
masks_src.append(last_src_id)
src_names.append('ossl-%d' % args.ossl)
last_src_id += 1
# Load statistics
st = key_stats.KeyStats()
st.load_tables()
if args.verbose:
print('Source stats: ')
for src in st.sources_cn:
print(' %30s: %08d' % (src, st.sources_cn[src]))
print('Group stats:')
for grp in st.groups:
print(' %30s: %02d' % (grp, st.get_group_size(grp)))
# mask indices
mask_map, mask_max, mask_map_x, mask_map_y, mask_map_last_x, mask_map_last_y = keys_basic.generate_pubkey_mask_indices(
)
print('Max mask 1D config: [%d]' % mask_max)
print('Max mask 2D config: [%d, %d]' % (mask_map_last_x, mask_map_last_y))
# masks processing part
if len(masks_db) == 0:
return
# Simple match
if args.per_key_stat:
print('Per-key matching: ')
for idx, mask in enumerate(masks_db):
print('Key %02d, mask: %s' % (idx, mask))
res = []
for src in st.table_prob:
val = st.table_prob[src][mask]
res.append((src, val if val is not None else 0))
print_res(res, st)
# Total key matching
use_loglikelihood = True
print('Fit for all keys in one distribution:')
total_weights = src_total_match = comp_total_match_dict(
masks_db, st, loglikelihood=use_loglikelihood)
res = key_val_to_list(src_total_match)
print_res(res, st, loglikelihood=use_loglikelihood)
res = st.res_src_to_group(res)
# bar_chart(res=res, title='Fit for all keys')
# Avg + mean
print('Avg + mean:')
src_total_match = {} # source -> [p1, p2, p3, p4, ..., p_keynum]
for src in st.table_prob:
src_total_match[src] = []
for idx, mask in enumerate(masks_db):
val = keys_basic.aggregate_mask(st.sources_masks_prob[src], mask)
if use_loglikelihood:
if total_weights[src] is not None:
src_total_match[src].append(val + total_weights[src])
else:
src_total_match[src].append(-9999.9)
else:
src_total_match[src].append(val * total_weights[src])
pass
pass
res = []
devs = []
for src in st.sources:
m = np.mean(src_total_match[src])
s = np.std(src_total_match[src])
res.append((src, m))
devs.append(s)
# Total output
print_res(res, st, error=devs, loglikelihood=use_loglikelihood)
# bar_chart(res=res, error=devs, title='Avg for all keys + error')
# PCA on the keys - groups
keys_grp_vec = []
for idx, mask in enumerate(masks_db):
keys_grp_vec.append([])
for src in st.groups:
keys_grp_vec[idx].append(0)
for idxs, src in enumerate(st.sources):
grp = st.src_to_group(src)
prob = st.table_prob[src][mask]
keys_grp_vec[idx][st.get_group_idx(grp)] += prob
if args.pca_grp:
X = np.array(keys_grp_vec)
pca = PCA(n_components=2)
pca.fit(X)
X_transformed = pca.transform(X)
print('PCA mean: %s, components: ' % pca.mean_)
print(pca.components_)
masks_src_np = np.array(masks_src)
plt.rcdefaults()
colors = matplotlib.cm.rainbow(np.linspace(0, 1, last_src_id))
for src_id in range(0, last_src_id):
plt.scatter(X_transformed[masks_src_np == src_id, 0],
X_transformed[masks_src_np == src_id, 1],
label=src_names[src_id],
color=colors[src_id],
alpha=0.25,
marker=',')
plt.legend(loc="best", shadow=False, scatterpoints=1)
plt.show()
# Random subset
if args.subs:
masks_db_tup = []
for idx, mask in enumerate(masks_db):
masks_db_tup.append((idx, mask, masks_src[idx]))
# Many random subsets, top groups
subs_size = args.subs_k
subs_count = args.subs_n
groups_cnt = {}
subs_data = []
subs_data_mark = []
dsrc_num = last_src_id + 1
# Take subs_count samples fro the input masks_db, evaluate it, prepare for PCA
for i in range(0, subs_count):
masks = random_subset(masks_db_tup, subs_size)
src_total_match = comp_total_match_dict([x[1] for x in masks], st)
res = key_val_to_list(src_total_match)
total = 0.0
for tup in res:
total += tup[1]
# data vectors for PCA
tmp_data = []
for idx, tmp_src in enumerate(st.sources):
val = src_total_match[tmp_src]
val = long(math.floor(val * (1000.0 / total)))
tmp_data.append(val)
# PCA on groups.
# if want PCA on sources, use subs_data.append(tmp_data)
subs_data.append(tmp_data)
# res_grp_val = st.res_src_to_group(zip(st.sources, tmp_data))
# subs_data.append([x[1] for x in res_grp_val])
subs_dsources = {}
max_dsrc = (0, 0)
for dsrc in [x[2] for x in masks]:
if dsrc not in subs_dsources:
subs_dsources[dsrc] = 0
subs_dsources[dsrc] += 1
for dsrc in subs_dsources:
if subs_dsources[dsrc] > max_dsrc[1]:
max_dsrc = (dsrc, subs_dsources[dsrc])
tmp_mark = max_dsrc[0]
if max_dsrc[1] == subs_size:
tmp_mark = max_dsrc[0]
else:
tmp_mark = last_src_id
subs_data_mark.append(tmp_mark)
for tup in res:
src = tup[0]
score = long(math.floor(tup[1] * (1000.0 / total)))
if score == 0:
continue
grp = st.src_to_group(src)
if grp not in groups_cnt:
groups_cnt[grp] = score
else:
groups_cnt[grp] += score
if src not in groups_cnt:
groups_cnt[src] = score
else:
groups_cnt[src] += score
# Equalize group sizes
for grp in st.groups:
grp = grp.lower()
if grp in groups_cnt:
groups_cnt[grp] /= float(st.get_group_size(grp))
# best group only
# best_src = res[0][0]
# best_grp = st.src_to_group(best_src)
# if best_grp not in groups_cnt:
# groups_cnt[best_grp] = 1
# else:
# groups_cnt[best_grp] += 1
print('Combinations: (N, k)=(%d, %d) = %d' %
(subs_count, subs_size, scipy.misc.comb(subs_count, subs_size)))
sources = st.groups
values = []
for source in sources:
val = groups_cnt[source] if source in groups_cnt else 0
values.append(val)
bar_chart(sources,
values,
xlabel='# of occurrences as top group (best fit)',
title='Groups vs. %d random %d-subsets' %
(subs_count, subs_size))
# PCA stuff
X = np.array(subs_data)
pca = PCA(n_components=2)
pU, pS, pV = pca._fit(X)
X_transformed = pca.transform(X)
subs_data_mark_pca = np.array(subs_data_mark)
print('Sources: ')
print(st.sources)
print('PCA input data shape %d x %d' %
(len(subs_data), len(subs_data[0])))
print('PCA mean: \n%s \nPCA components: \n' % pca.mean_)
print(pca.components_)
print('PCA components x: ')
for x in pca.components_[0]:
print x
print('\nPCA components y: ')
for y in pca.components_[1]:
print y
# print('\nPCA U,S,V')
# print(pU)
# print(pS)
# print(pV)
colors = ['blue', 'red', 'green', 'gray', 'yellow']
plt.rcdefaults()
for src_id in range(0, dsrc_num):
plt.scatter(X_transformed[subs_data_mark_pca == src_id, 0],
X_transformed[subs_data_mark_pca == src_id, 1],
color=colors[src_id],
alpha=0.5 if src_id < dsrc_num - 1 else 0.2)
plt.legend(loc="best", shadow=False, scatterpoints=1)
# plt.scatter([x[0] for x in X_transformed],
# [x[1] for x in X_transformed],
# alpha=0.5)
plt.show()
# PCA against defined sources with known distributions?
# Creates "background distribution" we want to match to
if args.pca_src:
# Four axes, returned as a 2-d array
plt.rcdefaults()
#f, axarr = plt.subplots(len(st.sources), 1)
src_k = args.pca_src_k
src_n = args.pca_src_n
# prepare PDF
ppdf = PdfPages('test.pdf') # todo-filenae-from-set
sources_to_test = st.sources[20:25] + [
x for x in st.sources if 'micro' in x.lower()
]
# compute for each source
src_mark_idx = len(subs_data_mark)
subs_data_src = subs_data
subs_data_mark_src = subs_data_mark
for src_idx, source in enumerate(sources_to_test):
# cur_plot = axarr[src_idx]
cur_plot = plt
print('Plotting PCA source %s %d/%d' %
(source, src_idx + 1, len(sources_to_test)))
# Extend subs_data_src with draws from the source distribution
for i in range(0, src_n):
masks = []
for tmpk in range(0, src_k):
masks.append(st.sample_source_distrib(source))
src_total_match = comp_total_match_dict(masks, st)
res = key_val_to_list(src_total_match)
total = 0.0
for tup in res:
total += tup[1]
# data vectors for PCA
tmp_data = []
for idx, tmp_src in enumerate(st.sources):
val = src_total_match[tmp_src]
val = long(math.floor(val * (1000.0 / total)))
tmp_data.append(val)
# PCA on groups.
# if want PCA on sources, use subs_data.append(tmp_data)
subs_data_src.append(tmp_data)
subs_data_mark_src.append(src_mark_idx)
# PCA stuff
X = np.array(subs_data_src)
pca = PCA(n_components=2)
pU, pS, pV = pca._fit(X)
X_transformed = pca.transform(X)
subs_data_mark_pca = np.array(subs_data_mark_src)
colors = ['blue', 'red', 'green', 'gray', 'yellow']
# plot input sources
for src_id in range(0, dsrc_num):
cur_plot.scatter(
X_transformed[subs_data_mark_pca == src_id, 0],
X_transformed[subs_data_mark_pca == src_id, 1],
color=colors[src_id],
alpha=0.5 if src_id < dsrc_num - 1 else 0.2)
# plot the source stuff
cur_plot.scatter(
X_transformed[subs_data_mark_pca == src_mark_idx, 0],
X_transformed[subs_data_mark_pca == src_mark_idx, 1],
color='gray',
marker='+',
alpha=0.05)
cur_plot.legend(loc="best", shadow=False, scatterpoints=1)
cur_plot.title('Src [%s] input: %s' % (source,
(', '.join(src_names))))
cur_plot.savefig(ppdf, format='pdf')
cur_plot.clf()
print('Finalizing PDF...')
# plt.savefig(ppdf, format='pdf')
ppdf.close()
pass
if args.distrib:
# Plotting distributions for groups, to the PDF
plt.rcdefaults()
ppdf = PdfPages('groups_distrib.pdf')
# Compute for each source
range_ = st.masks
range_idx = np.arange(len(st.masks))
for grp_idx, grp in enumerate(st.groups):
cur_data = st.groups_masks_prob[grp]
raw_data = [cur_data[x] for x in st.masks]
cur_plot = plt
logger.debug('Plotting distribution %02d/%02d : %s ' %
(grp_idx + 1, len(st.groups), grp))
axes = cur_plot.gca()
axes.set_xlim([0, len(st.masks)])
cur_plot.bar(range_idx, raw_data, linewidth=0, width=0.4)
cur_plot.title('%s (%s)' % (grp, get_group_desc(grp, st)))
cur_plot.savefig(ppdf, format='pdf')
cur_plot.clf()
# Print input data - per source
max_src = max(masks_src)
bars = []
for src_id in range(max_src + 1):
axes = plt.gca()
axes.set_xlim([0, len(st.masks)])
map_data = {}
for mask in st.masks:
map_data[mask] = 0.0
for mask_idx, mask in enumerate(masks_db):
if masks_src[mask_idx] == src_id:
map_data[mask] += 1
raw_data = []
for mask in st.masks:
raw_data.append(map_data[mask])
b1 = plt.bar(range_idx, raw_data, linewidth=0, width=0.4)
bars.append(b1)
plt.title('Source %d' % src_id)
plt.savefig(ppdf, format='pdf')
plt.clf()
# Group distribution + source:
if args.distribmix:
width = 0.25
range_idx = np.arange(len(st.masks))
# One source to the graph
max_src = max(masks_src)
cur_plot = plt
for src_id in range(max_src + 1):
bars = []
logger.debug('Plotting mix distribution src %d ' % src_id)
map_data = {}
for mask in st.masks:
map_data[mask] = 0.0
for mask_idx, mask in enumerate(masks_db):
if masks_src[mask_idx] == src_id:
map_data[mask] += 1
raw_data = []
for mask in st.masks:
raw_data.append(map_data[mask])
raw_data = np.array(raw_data)
raw_data /= float(sum(raw_data))
for grp_idx, grp in enumerate(st.groups):
logger.debug(
' - Plotting mix distribution %02d/%02d : %s ' %
(grp_idx + 1, len(st.groups), grp))
# Source
fig, ax = plt.subplots()
b1 = ax.bar(range_idx + width,
raw_data,
linewidth=0,
width=width,
color='r')
bars.append(b1)
# Group
cur_data2 = st.groups_masks_prob[grp]
raw_data2 = [cur_data2[x] for x in st.masks]
bar1 = ax.bar(range_idx,
raw_data2,
linewidth=0,
width=width,
color='b')
bars.append(bar1)
ax.legend(tuple([x[0] for x in bars]),
tuple(['Src %d' % src_id, grp]))
ax.set_xlim([0, len(st.masks)])
cur_plot.title('%s + source %d' % (grp, src_id))
cur_plot.savefig(ppdf, format='pdf')
cur_plot.clf()
logger.info('Finishing PDF')
ppdf.close()
pass
if args.mixture:
# http://www.pymix.org/pymix/index.php?n=PyMix.Tutorial#bayesmix
# 1. Create mixture model = add discrete distributions to the package
dists = []
alphabet = mixture.Alphabet(st.masks)
taken_src = []
for src in st.sources:
if 'openssl 1.0.2g' == src or 'microsoft .net' == src:
pass
else:
continue
print(' - Source: %s' % src)
taken_src.append(src)
probs = []
for m in st.masks:
probs.append(st.sources_masks_prob[src][m])
d = mixture.DiscreteDistribution(len(alphabet),
probs,
alphabet=alphabet)
dists.append(d)
# 2. Create the model, for now, with even distribution among components.
comp_weights = [1.0 / len(dists)] * len(dists)
mmodel = mixture.MixtureModel(len(dists), comp_weights, dists)
print '-' * 80
print mmodel
print '-' * 80
# dump mixtures to the file
mixture.writeMixture(mmodel, 'src.mix')
# 3. Input data - array of input masks
masks_data = [[x] for x in masks_db]
data = mixture.DataSet()
data.fromList(masks_data)
data.internalInit(mmodel)
print masks_data
print data
print '---------'
# 4. Compute EM
# if there is a distribution in the input data which has zero matching inputs,
# an exception will be thrown. Later - discard such source from the input...
print mmodel.modelInitialization(data, 1)
print('EM start: ')
ress = []
for r in range(10):
mmodel.modelInitialization(data, 1)
emres = mmodel.EM(data, 1000, 0.00000000000000001)
ress.append(emres)
emres = max(ress, key=lambda x: x[1])
# print mmodel.randMaxEM(data, 10, 40, 0.1)
print emres
# Plot
plt.rcdefaults()
# plt.plot(range(0, len(emres[0][3])), [2.71828**x for x in emres[0][3]], 'o')
# plt.plot(range(0, len(emres[0][3])), emres[0][3], 'k')
# plt.show()
for i in range(0, 5):
print('-------')
for idx, src in enumerate(emres[0]):
print('- i:%02d src: %02d, val: %s' % (i, idx, src[i]))
colors = matplotlib.cm.rainbow(np.linspace(0, 1, len(taken_src)))
range_ = range(0, len(emres[0][0]))
bars = []
for idx, src in enumerate(emres[0]):
b1 = plt.bar(range_, [2.71828**x for x in src], color=colors[idx])
bars.append(b1)
plt.legend(tuple(bars), tuple(taken_src))
plt.grid(True)
plt.show()
# for src in emres[0]:
# plt.plot(range(0, len(src)), [2.71828**x for x in src], 'o')
# # plt.grid(True)
# # plt.show()
#
# # plt.scatter(mask_map_last_x, mask_map_last_y, c='red', s=scale, alpha=0.3)
# # plt.legend()
# plt.grid(True)
# plt.show()
# Chisquare
for source in st.sources_masks:
cn = st.sources_cn[source]
# chi = chisquare()
# gen = keys_basic.generate_pubkey_mask()
# 2D Key plot
if args.plot_key_dist:
plot_key_mask_dist(masks_db, st)
def clustering(k, feature_cols, feature_domains, header, table, seeds,
result_file):
best_loglike = None
best_model = None
# Giant random seeding loop,
data = mx.DataSet()
data.fromArray(table)
for r in range(1):
# weights = np.random.random_sample(k)
# weights_norm = weights / sum(weights)
weights_norm = [1.0 / k] * k
components = []
for i in range(k):
products = []
for j in range(table.shape[1]):
col_type = prep.get_col_type(feature_cols[j], header)
col_id = feature_cols[j]
if col_type == 'cat':
vals = feature_domains[col_id].keys()
cnt_vals = len(vals)
rand_dist = np.random.random_sample(cnt_vals)
dist = mx.DiscreteDistribution(cnt_vals,
rand_dist / sum(rand_dist),
mx.Alphabet(vals))
elif col_type == 'num':
min_val = feature_domains[col_id]['min']
max_val = feature_domains[col_id]['max']
# mean = random.uniform(min_val, max_val)
mean = seeds[header[col_id][0]][i]
stdev = (max_val - min_val) / 2.0 / k
dist = mx.NormalDistribution(mean, stdev)
else:
sys.exit(1)
products.append(dist)
comp = mx.ProductDistribution(products)
components.append(comp)
mix_table = mx.MixtureModel(k, weights_norm, components)
print mix_table
#loglike = mix_table.randMaxEM(data,1,50,50)
#print loglike
#print mix_table
if not best_loglike or loglike > best_loglike:
# best_loglike = loglike
best_model = copy.copy(mix_table)
#data.internalInit(mix)
# mix_table.modelInitialization(data)
# print best_loglike
# print best_model
labels = best_model.classify(data, None, None, 1)
## output clustering results
# count cluster sizes on sampled data
f = open(result_file + '.stats', 'w')
cnt = {}
for l in labels:
cnt[l] = 1 if l not in cnt else cnt[l] + 1
for l in cnt:
f.write('%s %d %f%%\n' %
(l, cnt[l], cnt[l] * 100.0 / sum(cnt.values())))
f.close()
mx.writeMixture(best_model, result_file + '.model')
return best_model