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EventDetection.py
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Wed, May 1, 18:32

EventDetection.py
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import NanoporeClasses as NC
import shelve
import os
import glob
from time import sleep
import Functions
from pprint import pprint
import matplotlib.pyplot as plt
from matplotlib.ticker import EngFormatter
import numpy as np
import sys
import argparse
import datetime
from tkinter.filedialog import askopenfilenames,askdirectory
import timeit
import LoadData
timeInSec= EngFormatter(unit='s', places=2)
#Default parameters
extension = '*.log'
coefficients = {'a': 0.999,
'E': 0,
'S': 5,
'maxEventLength': 200e-3,
'minEventLength': 500e-6,
'hbook': 1,
'delta': 0.2e-9,
'ChimeraLowPass': 10e3}
def GetParameters():
print("Usage:")
print("run(inputData, newExtension=None, newCoefficients={}, outputFile=None, force=False, cut=False, verbose=False)")
print()
print("Default extension:")
print(extension)
print()
print("Default coefficients:")
pprint(coefficients)
def batcheventdetection(folder,extension,coefficients, verbose=True, forceRun=False, CutTraces=False):
#Create new class that contains all events
AllEvents=NC.AllEvents()
print('found ' + str(len(glob.glob(os.path.join(folder,extension)))) + ' files.')
#Loop over all files in folder
for fullfilename in glob.glob(os.path.join(folder,extension)):
#Extract filename and generate filename to save located events
if verbose:
print('analysing '+fullfilename)
filename, file_extension = os.path.splitext(os.path.basename(fullfilename))
directory=os.path.dirname(fullfilename) + os.sep + 'analysisfiles'
if not os.path.exists(directory):
os.makedirs(directory,exist_ok=True)
savefilename=directory + os.sep + filename + 'data'
shelfFile = shelve.open(savefilename)
if ~forceRun:
try: #Check if file can be loaded
coefficientsloaded=shelfFile['coefficients']
tEL=shelfFile['translocationEvents']
# If coefficients before are not identical, analysis needs to run again
if (coefficientsloaded==coefficients):
if verbose:
print('loaded from file')
else:
forceRun = True
except:
#Except if cannot be loaded, analysis needs to run
forceRun=True
pass
if forceRun:
#Extract list of events for this file
tEL=eventdetection(fullfilename,coefficients,verbose, CutTraces)
if verbose:
print('Saved {} events'.format(len(tEL.events)))
#Open savefile and save events for this file
shelfFile['translocationEvents']=tEL
shelfFile['coefficients']=coefficients
if verbose:
print('saved to file')
shelfFile.close()
#Add events to the initially created class that contains all events
AllEvents.AddEvent(tEL)
return AllEvents
def eventdetection(fullfilename, coefficients, verbose=True, CutTraces=False, showFigures = False):
"""
Function used to find the events of TranslocationEvents class in the raw data in file 'filename'.
It calls the function RecursiveLowPassFast to approximatively locate rough events in the data.
If a short TranslocationEvent object is detected its type attribute will be changed to 'Impulse' and the
meanTrace attribute will take the value of the minimal current value within the event.
Then the CUSUM function will be called to build the CUSUM-fit and assign values to the different
attributes of the TranslocationEvent objects.
Depending on how the CUSUM was able to fit the trace inside and around the event, the type attribute of the TransocationEvent will be set to 'Real'
(if the CUSUM fit went well) or 'Rough' (if the CUSUM was not able to fit the trace).
Returns the list of TranslocationEvent objects.
"""
if 'ChimeraLowPass' in coefficients:
ChimeraLowPass=coefficients['ChimeraLowPass']
else:
ChimeraLowPass=None
loadedData=LoadData.OpenFile(fullfilename, ChimeraLowPass, True, CutTraces)
minTime=coefficients['minEventLength']
IncludedBaseline = int(1e-2 * loadedData['samplerate'])
delta=coefficients['delta']
hbook=coefficients['hbook']
if verbose:
print('Recursive lowpass...', end='')
#Call RecursiveLowPassFast to detect events in current trace
start_time = timeit.default_timer()
if 'i1Cut' in loadedData:
events=[]
for cutTrace in loadedData['i1Cut']:
events.extend(Functions.RecursiveLowPassFast(cutTrace,coefficients,loadedData['samplerate']))
else:
events=Functions.RecursiveLowPassFast(loadedData['i1'],coefficients,loadedData['samplerate'])
if verbose:
print('done. Calculation took {}'.format(timeInSec.format_data(timeit.default_timer() - start_time)))
print('nr events: {}'.format(len(events)))
#CusumParameters = [delta sigma Normalize ImpulsionLimit IncludedBaseline TooMuchLevels IncludedBaselinePlots 1
# SamplingFrequency];
#[EventDatabase] = event_detection(RawSignal, CusumParameters, RoughEventLocations, lowpasscutoff);
#Make a new class translocationEventList that contains all the found events in this file
translocationEventList=NC.AllEvents()
#Plot current file
if showFigures:
plt.figure(1)
plt.cla()
timeVals=np.linspace(0, len(loadedData['i1'])/loadedData['samplerate'], num=len(loadedData['i1']))
plt.plot(timeVals,loadedData['i1'])
plt.draw()
plt.pause(0.001)
if verbose:
print('CUSUM fitting...', end='')
#Call RecursiveLowPassFast to detect events in current trace
start_time = timeit.default_timer()
cusumEvents = 0
#Loop over all detected events
for event in events:
beginEvent = event[0]
endEvent = event[1]
localBaseline = event[2]
stdEvent = event[3]
lengthevent=endEvent-beginEvent
# Check if the start of the event is > IncludedBaseline then compare eventtime to minimal and maxima;
if beginEvent > IncludedBaseline:
# Extract trace and extract baseline
Trace = loadedData['i1'][int(beginEvent):int(endEvent)]
traceBefore = loadedData['i1'][int(beginEvent) - IncludedBaseline:int(beginEvent)]
traceAfter = loadedData['i1'][int(endEvent):int(endEvent) + IncludedBaseline]
if lengthevent<=(minTime*loadedData['samplerate']) and lengthevent>3:
newEvent = NC.TranslocationEvent(fullfilename,'Impulse')
# Add Trace, mean of the event,the samplerate, coefficients and baseline to the New Event class
newEvent.SetEvent(Trace, beginEvent,localBaseline, loadedData['samplerate'])
if 'blockLength' in loadedData:
voltI = int(beginEvent/loadedData['blockLength'])
else:
voltI = int(0)
newEvent.SetCoefficients(coefficients, loadedData['v1'][voltI])
newEvent.SetBaselineTrace(traceBefore, traceAfter)
# Add event to TranslocationList
translocationEventList.AddEvent(newEvent)
elif lengthevent>(minTime*loadedData['samplerate']) and lengthevent<(coefficients['maxEventLength']*loadedData['samplerate']):
#Make new event class
#CUSUM fit
sigma = np.sqrt(stdEvent)
h = hbook * delta / sigma
(mc, kd, krmv)= Functions.CUSUM(loadedData['i1'][int(beginEvent) - IncludedBaseline: int(endEvent) + IncludedBaseline], delta, h)
krmv = [krmvVal + int(beginEvent) - IncludedBaseline + 1 for krmvVal in krmv]
#Add Trace, mean of the event,the samplerate, coefficients and baseline to the New Event class
if len(krmv)>2:
newEvent = NC.TranslocationEvent(fullfilename, 'Real')
Trace=loadedData['i1'][int(krmv[0]):int(krmv[-1])]
traceBefore = loadedData['i1'][int(krmv[0]) - IncludedBaseline:int(krmv[0])]
traceAfter = loadedData['i1'][int(krmv[-1]):int(krmv[-1]) + IncludedBaseline]
beginEvent=krmv[0]
else:
newEvent = NC.TranslocationEvent(fullfilename, 'Rough')
newEvent.SetEvent(Trace,beginEvent,localBaseline,loadedData['samplerate'])
newEvent.SetBaselineTrace(traceBefore, traceAfter)
newEvent.SetCUSUMVariables(mc, kd, krmv)
cusumEvents+=1
if 'blockLength' in loadedData:
voltI = int(beginEvent/loadedData['blockLength'])
else:
voltI = int(0)
newEvent.SetCoefficients(coefficients,loadedData['v1'][voltI])
#Add event to TranslocationList
translocationEventList.AddEvent(newEvent)
if verbose:
print('done. Calculation took {}'.format(timeInSec.format_data(timeit.default_timer() - start_time)))
print('{} events fitted'.format(cusumEvents))
#Plot events if True
if showFigures:
minVal=np.max(loadedData['i1'])#-1.05e-9 #np.min(loadedData['i1'])
maxVal=np.max(loadedData['i1'])+0.05e-9#-1.05e-9 #np.min(loadedData['i1'])
for i in range(len(events)):
beginEvent=events[i][0]
endEvent = events[i][1]
if beginEvent>100 and (endEvent - beginEvent) >= (minTime * loadedData['samplerate']) and (endEvent - beginEvent) < (
coefficients['maxEventLength'] * loadedData['samplerate']):
plt.plot([beginEvent/loadedData['samplerate'], beginEvent/loadedData['samplerate']], [minVal, maxVal], 'y-', lw=1)
#plt.draw()
plt.show()
#plt.pause(1)
return translocationEventList
def LoadEvents(loadname):
#Check if loadname is a directory or not
if os.path.isdir(loadname):
#create standard filename for loading
loadFile = os.path.join(loadname,os.path.basename(loadname)+'_Events')
else:
loadFile, file_extension = os.path.splitext(loadname)
#Open file and extract TranslocationEvents
shelfFile=shelve.open(loadFile)
TranslocationEvents=shelfFile['TranslocationEvents']
shelfFile.close()
AllEvents=NC.AllEvents()
AllEvents.AddEvent(TranslocationEvents)
AllEvents.SetFolder(loadname)
return AllEvents
def run(inputData, newExtension=None, newCoefficients={}, outputFile=None, force=False, cut=False, verbose=False):
"""
Function used to call all the other functions in the module
needed to find the events in raw nanopore experiment data.
Returns an object of class AllEvents with a list of TranslocationEvents as an argument.
"""
if newExtension is None:
newExtension = extension
for key in newCoefficients:
coefficients[key]=newCoefficients[key]
if os.path.isdir(inputData):
TranslocationEvents=batcheventdetection(inputData, newExtension, coefficients, verbose, force, cut)
else:
TranslocationEvents=eventdetection(inputData,coefficients, verbose, cut)
#Check if list is empty
if outputFile is not None and TranslocationEvents.events:
if os.path.isdir(inputData):
outputData = inputData + os.sep + 'Data' + os.sep + 'Data' + datetime.date.today().strftime("%Y%m%d")
LoadData.SaveVariables(outputFile,TranslocationEvents=TranslocationEvents)
return True
else:
return TranslocationEvents
if __name__=='__main__':
parser = argparse.ArgumentParser()
parser.add_argument('-i', '--input', help='Input directory or file')
parser.add_argument('-e', '--ext', help='Extension for input directory')
parser.add_argument('-o', '--output', help='Output file for saving')
parser.add_argument('-c', '--coeff', help='Coefficients for selecting events [-C filter E standarddev maxlength minlength', nargs = '+')
parser.add_argument('-u', '--cut', help='Cut Traces before detecting event, prevent detecting appended chunks as event', action='store_true')
parser.add_argument('-f', '--force', help='Force analysis to run (don''t load from file', action='store_true')
args = parser.parse_args()
inputData=args.input
if inputData==None:
inputData=askdirectory()
outputData=args.output
if outputData==None:
if os.path.isdir(inputData):
outputData = inputData + os.sep + 'Data' + os.sep + 'Data' + datetime.date.today().strftime("%Y%m%d")
else:
outputData=os.path.dirname(inputData) + os.sep + 'Data' + os.sep + 'Data' + datetime.date.today().strftime("%Y%m%d")
if args.coeff is not None:
if len(args.coeff) % 2 == 0:
for i in range(0, len(args.coeff), 2):
if i <= len(args.coeff):
coefficients[str(args.coeff[i])]=float(args.coeff[i+1])
if args.ext is not None:
extension = args.ext
print('Loading from: ' + inputData)
print('Saving to: ' + outputData)
print('Coefficients are: ', end='')
pprint(coefficients)
if os.path.isdir(inputData):
print('extension is: ' + extension +'\nStarting.... \n')
TranslocationEvents=batcheventdetection(inputData, extension, coefficients, args.force, args.cut)
else:
print('Starting.... \n')
TranslocationEvents=eventdetection(inputData,coefficients, args.cut)
#Check if list is empty
if TranslocationEvents.events:
LoadData.SaveVariables(outputData,TranslocationEvents=TranslocationEvents)

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