def get_ecg_signal(rec_name, annotation, start_time, end_time):
#variables and arrays
iteration = []
sig_time = []
#count=0;
#ann_graph=[];
#split_time0=[];
#annotator_array=[];
nsamp, freq, annot, init_time, sdata = ws.setupWfdb(rec_name, annotation)
sig0 = []
sig1 = []
#physig0 is array with physical units
physig0 = []
physig1 = []
print type(init_time)
#print("strtim for starting value is: " + str(wfdb.strtim(init_time)));
#print("total num of samples: " + str(nsamp));
#print "Starting time of record is: "+ str(init_time);
#print("sampling frequency is:"+ str(freq));
#sample interval
#required length of signal in seconds
#num_sample_start=start_time*60*freq
num_sample_end = end_time * 60 * freq
loop_iteration = int(math.floor(num_sample_end))
#print("loop iteration = " +str(loop_iteration));
# loop runs for loop_iteration times to extract signal samples
num_value = loop_iteration
for i in range(0, num_value):
if wfdb.getvec(sdata.cast()) < 0:
print "ERROR: getvec() < 0"
exit()
else:
#signal values in adu units:
sig0.append(sdata[0])
sig1.append(sdata[1])
sig_time.append(gettime(i, freq, init_time))
#print("time for sample " + str(i) + "is: " + str(sig_time[i]));
#convert adu units to physical units and save in physig0 and 1 (later generalise it for n number of signals)
physig0.append(aduphys(0, sig0[i]))
physig1.append(aduphys(1, sig1[i]))
#append iteration number as value in
iteration.append(i)
#getann reads next annotation and returns 0 when successful
while wfdb.getann(0, annot) == 0:
if annot.time > num_value:
#print("annot.time>number of samples extracted");
break
# annot.time is time of the annotation, in samples from the beginning of the record.
print wfdb.timstr(-annot.time), "(" + str(
annot.time) + ")", wfdb.annstr(
annot.anntyp), annot.subtyp, annot.chan, annot.num
print("signal value at this annotation is : " +
str(physig0[annot.time]) + " " + str(sig_time[annot.time]))
return (physig0, physig1, sig_time)
# loop runs for loop_iteration times to extract signal samples
num_value = loop_iteration
for i in range(0, num_value):
if wfdb.getvec(sdata.cast()) < 0:
print "ERROR: getvec() < 0"
exit()
else:
#signal values in adu units:
sig0.append(sdata[0])
sig1.append(sdata[1])
sig_time.append(gettime(i, freq, init_time))
#print("time for sample " + str(i) + "is: " + str(sig_time[i]));
#convert adu units to physical units and save in physig0 and 1 (later generalise it for n number of signals)
physig0.append(aduphys(0, sig0[i]))
physig1.append(aduphys(1, sig1[i]))
#append iteration number as value in
iteration.append(i)
# for i in range(0,num_value):
# if wfdb.getvec(sdata.cast()) < 0:
# print "ERROR: getvec() < 0";
# exit();
# else:
# #signal values in adu units:
# sig0.append(sdata[0]);
# sig1.append(sdata[1]);
# sig_time.append(gettime(i, freq, init_time));
#
# start_sec=4*60
def get_ecg_signal(rec_name,annotation,start_time,end_time):
#variables and arrays
iteration=[];
sig_time=[];
#count=0;
#ann_graph=[];
#split_time0=[];
#annotator_array=[];
nsamp, freq, annot, init_time,sdata = ws.setupWfdb(rec_name,annotation);
sig0 = [];
sig1 = [];
#physig0 is array with physical units
physig0=[];
physig1=[];
print type(init_time);
#print("strtim for starting value is: " + str(wfdb.strtim(init_time)));
#print("total num of samples: " + str(nsamp));
#print "Starting time of record is: "+ str(init_time);
#print("sampling frequency is:"+ str(freq));
#sample interval
#required length of signal in seconds
#num_sample_start=start_time*60*freq
num_sample_end=end_time*60*freq
loop_iteration=int(math.floor(num_sample_end));
#print("loop iteration = " +str(loop_iteration));
# loop runs for loop_iteration times to extract signal samples
num_value=loop_iteration;
for i in range(0,num_value):
if wfdb.getvec(sdata.cast()) < 0:
print "ERROR: getvec() < 0";
exit();
else:
#signal values in adu units:
sig0.append(sdata[0]);
sig1.append(sdata[1]);
sig_time.append(gettime(i, freq, init_time));
#print("time for sample " + str(i) + "is: " + str(sig_time[i]));
#convert adu units to physical units and save in physig0 and 1 (later generalise it for n number of signals)
physig0.append(aduphys(0,sig0[i]));
physig1.append(aduphys(1,sig1[i]));
#append iteration number as value in
iteration.append(i);
#getann reads next annotation and returns 0 when successful
while wfdb.getann(0,annot) ==0:
if annot.time>num_value:
#print("annot.time>number of samples extracted");
break;
# annot.time is time of the annotation, in samples from the beginning of the record.
print wfdb.timstr(-annot.time),"(" + str(annot.time)+ ")",wfdb.annstr(annot.anntyp), annot.subtyp,annot.chan, annot.num
print ("signal value at this annotation is : " + str(physig0[annot.time])+" "+ str(sig_time[annot.time]));
return(physig0,physig1,sig_time)
# loop runs for loop_iteration times to extract signal samples
num_value=loop_iteration;
for i in range(0,num_value):
if wfdb.getvec(sdata.cast()) < 0:
print "ERROR: getvec() < 0";
exit();
else:
#signal values in adu units:
sig0.append(sdata[0]);
sig1.append(sdata[1]);
sig_time.append(gettime(i, freq, init_time));
#print("time for sample " + str(i) + "is: " + str(sig_time[i]));
#convert adu units to physical units and save in physig0 and 1 (later generalise it for n number of signals)
physig0.append(aduphys(0,sig0[i]));
physig1.append(aduphys(1,sig1[i]));
#append iteration number as value in
iteration.append(i);
# for i in range(0,num_value):
# if wfdb.getvec(sdata.cast()) < 0:
# print "ERROR: getvec() < 0";
# exit();
# else:
# #signal values in adu units:
# sig0.append(sdata[0]);
# sig1.append(sdata[1]);
# sig_time.append(gettime(i, freq, init_time));
#
# start_sec=4*60
def aduphys(*args): return _wfdb.aduphys(*args)
