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eval_pred_DB_CW.py
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# coding: utf-8
# In[1]:
import sys
import os
import gc
import numpy as np
import matplotlib.pyplot as plt
from sklearn.metrics import roc_curve, roc_auc_score
from utilities.config_handler import get_config, get_classes
from utilities.anomal_gen import sweep, CW
from utilities.preprocessing import persist_object, load_object, get_xhdr_sample_rate, load_raw_data, trim_iq_basic_block, get_config, get_basic_block_len, iq2fft, path2list
from utilities.plots import save_fig_pickle, load_fig_pickle, save_fig
# # Hyper parameters
def save_roc_plot(iq_normal, sample_rate, dBs, num_ROC_samples=500, score_method=None, score_name='normal'):
fprs, tprs, aucs = [], [], []
normal_plot_saved = 0
for ind,dB in enumerate(dBs):
gc.collect()
print('creating anomaly with {}dB...'.format(dB))
sweep_params['dB'] = dB
basic_len = get_basic_block_len(sample_rate)
roc_start_indices_path = os.path.join(model_root,'roc_start_indices.pkl')
num_samples = num_ROC_samples
if os.path.isfile(roc_start_indices_path) :
a_starts, c_starts = load_object(roc_start_indices_path)
if len(a_starts) != num_samples:
print('wrong length of roc_start_indices.pkl...\nchanging to roc_start_indices.pkl len')
num_samples = len(a_starts)
else:
a_starts = np.random.randint(0, iq_normal.shape[0] - basic_len, (num_samples,))
c_starts = np.random.randint(0, iq_normal.shape[0] - basic_len, (num_samples,))
persist_object([a_starts, c_starts], roc_start_indices_path)
tot_starts = np.concatenate([a_starts, c_starts])
y_true = np.concatenate([np.ones((num_samples,)), np.zeros((num_samples,))]).astype(bool)
y_score = np.zeros((2*num_samples,))
for i in range(2*num_samples):
if y_true[i]:
basic_iq = trim_iq_basic_block(iq_normal, sample_rate, start=tot_starts[i])
basic_iq = CW(basic_iq, sample_rate, anomal_freq, dB)
if i < 2:
model.plot_prediction(basic_iq, sample_rate)
f = plt.gcf()
f.suptitle('using model "' + model.name + '" on sweep with ISR: ' + str(dB)+'dB')
f.set_size_inches(12, 8, forward=True)
fig_path = os.path.join(plots_path, '{0:02d}_ISR_dB_{1}_sample_{2}'.format(ind, dB, i))
save_fig(f, fig_path)
plt.close()
else:
basic_iq = trim_iq_basic_block(iq_normal, sample_rate, start=tot_starts[i])
if normal_plot_saved < 2:
model.plot_prediction(basic_iq, sample_rate)
f = plt.gcf()
f.suptitle('using model "' + model.name + '" on normal data')
f.set_size_inches(12, 8, forward=True)
fig_path = os.path.join(plots_path, 'normal_sample_{0}'.format(normal_plot_saved))
save_fig(f, fig_path)
plt.close()
normal_plot_saved += 1
if score_method:
y_score[i] = score_method(basic_iq, sample_rate)
else:
y_score[i] = model.predict_basic_block_score(basic_iq,sample_rate)
fpr, tpr, thresholds = roc_curve(y_true, y_score)
fprs.append(fpr)
tprs.append(tpr)
aucs.append(roc_auc_score(y_true, y_score))
# ploting
f = plt.figure(0)
for j in range(len(dBs)-1,-1,-1):
plt.plot(fprs[j], tprs[j])
plt.legend(['anomaly in {}dB, auc: {:.3f}'.format(dBs[j],aucs[j]) for j in range(len(dBs)-1,-1,-1)])
plt.xlabel('False Positive Rate', fontsize=18)
plt.ylabel('True Positive Rate', fontsize=18)
plt.title('ROC for anomalies with different ISR [dB]', fontsize=20)
plt.gca().grid(True)
f.set_size_inches(8, 6.5, forward=True)
fig_path = os.path.join(plots_path, 'All_ROCs_'+score_name)
save_fig(f, fig_path)
plt.close()
persist_object({'dBs': dBs,
'aucs': aucs,
'name': model.name+'_score_'+score_name}, os.path.join(plots_path, 'roc_score_'+score_name+'.pkl'))
f = plt.figure(1)
plt.plot(dBs, aucs, '-o')
plt.ylim([0,1])
plt.xlabel('ISR in dB of anomaly', fontsize=18)
plt.ylabel('AUC score', fontsize=18)
plt.title('Sweep anomaly\nArea Under Curve as function of\nInterference Signal Ratio', fontsize=20)
plt.gca().grid(True)
f.set_size_inches(8, 6.5, forward=True)
fig_path = os.path.join(plots_path, 'dB_vs_AUC_'+score_name)
save_fig(f, fig_path)
plt.close()
normal_path = 'iq_data/gsm/files_23'
model_root = os.path.join('eval',path2list(normal_path)[1])
ModelClass_dic = get_classes()
ModelClass = ModelClass_dic['amir']
model = ModelClass(model_root=model_root)
plots_path = os.path.join(model.model_path, 'eval/ROC/sweep')
if not os.path.exists(plots_path):
os.makedirs(plots_path)
sample_rate = get_xhdr_sample_rate(normal_path)
iq_normal = load_raw_data(normal_path)
dBs = np.arange(-10, 26, 5)
sweep_params = {'freq_band': [-5e6, 5e6],
'delta_t': 50e-6,
'dB': 0,}
i = 0
score_methods = model.get_score_methods()
for score_name in score_methods:
score_meth = score_methods[score_name]
save_roc_plot(iq_normal, sample_rate, dBs, num_ROC_samples=250, score_method=score_meth, score_name=score_name)