def loadTrackView(trackData, region, borderHandling, allowOverlaps, trackName=[]):
"""
trackData : see TrackSource.getTrackData {'id' : smartmemmap}
region : see GenomeRegion
"""
#brShelve = BoundingRegionShelve(region.genome, trackName, allowOverlaps)
brShelve = trackData.boundingRegionShelve
brInfo = brShelve.getBoundingRegionInfo(region) if brShelve is not None else None
extraArrayNames = [arrayName for arrayName in trackData if arrayName not in \
RESERVED_PREFIXES.keys() + ['leftIndex', 'rightIndex']]
reservedArrays = [TrackViewLoader._getArray(trackData, arrayName, brInfo) for arrayName in RESERVED_PREFIXES]
extraArrays = [TrackViewLoader._getArray(trackData, arrayName, brInfo) for arrayName in extraArrayNames]
trackFormat = TrackFormat( *(reservedArrays + [OrderedDict(zip(extraArrayNames, extraArrays))]) )
if trackFormat.reprIsDense():
if brInfo is None:
leftIndex = region.start
rightIndex = region.end
else:
leftIndex = region.start - brInfo.start
rightIndex = region.end - brInfo.start
else:
leftBin = CompBinManager.getBinNumber(region.start)
rightBin = CompBinManager.getBinNumber(region.end-1)
#leftBin = region.start/COMP_BIN_SIZE
#rightBin = (region.end-1)/COMP_BIN_SIZE
if trackData.get('leftIndex') is None or trackData.get('rightIndex') is None:
raise IOError('Preprocessed track not found. TrackData: ' + ', '.join(trackData.keys()))
leftIndex = TrackViewLoader._getArray(trackData, 'leftIndex', brInfo, leftBin)
rightIndex = TrackViewLoader._getArray(trackData, 'rightIndex', brInfo, rightBin)
slicedReservedArrays = [(array[leftIndex:rightIndex] if array is not None else None) for array in reservedArrays]
slicedExtraArrays = [(array[leftIndex:rightIndex] if array is not None else None) for array in extraArrays]
argList = [region] + slicedReservedArrays + [borderHandling, allowOverlaps] + [OrderedDict(zip(extraArrayNames, slicedExtraArrays))]
tv = TrackView( *(argList) )
if not trackFormat.reprIsDense():
tv.sliceElementsAccordingToGenomeAnchor()
#tv._doScatteredSlicing()
return tv
class TrackView(object):
def _handlePointsAndPartitions(self):
if self.trackFormat.isDense() and not self.trackFormat.reprIsDense():
self._startList = self._endList[:-1]
self._endList = self._endList[1:]
if self._valList != None:
self._valList = self._valList[1:]
if self._strandList != None:
self._strandList = self._strandList[1:]
if self._idList != None:
self._idList = self._idList[1:]
if self._edgesList != None:
self._edgesList = self._edgesList[1:]
if self._weightsList != None:
self._weightsList = self._weightsList[1:]
for key, extraList in self._extraLists.items():
if extraList != None:
self._extraLists[key] = extraList[1:]
if not self.trackFormat.isDense() and not self.trackFormat.isInterval():
self._endList = VirtualPointEnd(self._startList)
def __init__(self, genomeAnchor, startList, endList, valList, strandList, idList, edgesList, \
weightsList, borderHandling, allowOverlaps, extraLists=OrderedDict()):
assert startList!=None or endList!=None or valList!=None or edgesList!=None
assert borderHandling in ['crop']
self.genomeAnchor = genomeAnchor.getCopy()
self.trackFormat = TrackFormat(startList, endList, valList, strandList, idList, edgesList, weightsList, extraLists)
self.borderHandling = borderHandling
self.allowOverlaps = allowOverlaps
self._trackElement = TrackElement(self)
#self._bpLevelArray = None
self._startList = startList
self._endList = endList
self._valList = valList
self._strandList = strandList
self._idList = idList
self._edgesList = edgesList
self._weightsList = weightsList
self._extraLists = copy(extraLists)
self._handlePointsAndPartitions()
if self._startList is None:
self._trackElement.start = noneFunc
if self._endList is None:
self._trackElement.end = noneFunc
if self._valList is None:
self._trackElement.val = noneFunc
if self._strandList is None:
self._trackElement.strand = noneFunc
if self._idList is None:
self._trackElement.id = noneFunc
if self._edgesList is None:
self._trackElement.edges = noneFunc
if self._weightsList is None:
self._trackElement.weights = noneFunc
self._updateNumListElements()
for i, list in enumerate([self._startList, self._endList, self._valList, self._strandList, self._idList, self._edgesList, self._weightsList] \
+ [extraList for extraList in self._extraLists.values()]):
assert list is None or len(list) == self._numListElements, 'List (%s): ' % i + str(list) + ' (expected %s elements, found %s)' % (self._numListElements, len(list))
def __iter__(self):
self._trackElement._index = -1
return self
def _updateNumListElements(self):
""
self._numListElements = self._computeNumListElements()
if self.allowOverlaps and self._numListElements > 0:
self._numIterElements = self._computeNumIterElements()
else:
self._numIterElements = self._numListElements
def _computeNumListElements(self):
for list in [self._startList, self._endList, self._valList, self._edgesList]:
if list is not None:
return len(list)
raise ShouldNotOccurError
def _computeNumIterElements(self):
for list in [self._startList, self._endList, self._valList, self._edgesList]:
if list is not None:
if isinstance(list, numpy.ndarray):
return len(self._removeBlindPassengersFromNumpyArray(list))
else:
return sum(1 for x in self)
raise ShouldNotOccurError
def __len__(self):
""
return self._bpSize()
def getNumElements(self):
return self._numIterElements
def _bpSize(self):
return len(self.genomeAnchor)
def next(self):
self._trackElement._index += 1
#To remove any blind passengers - segments entirely in front of genomeanchor,
# but sorted after a larger segment crossing the border
if self.allowOverlaps and not self.trackFormat.reprIsDense():
while self._trackElement._index < self._numListElements and self._endList[self._trackElement._index] <= self.genomeAnchor.start: #self._trackElement.end() <= 0:
self._trackElement._index += 1
if self._trackElement._index < self._numListElements:
return self._trackElement
else:
raise StopIteration
def _findLeftIndex(self):
leftIndex = 0
#remove track elements entirely to the left of the anchor
while leftIndex < len(self._endList) and self._endList[leftIndex] <= self.genomeAnchor.start:
leftIndex += 1
return leftIndex
def _findRightIndex(self):
rightIndex = self._numListElements
while rightIndex > 0 and self._startList[rightIndex-1] >= self.genomeAnchor.end:
rightIndex -= 1
return rightIndex
def sliceElementsAccordingToGenomeAnchor(self):
assert( not self.trackFormat.reprIsDense() )
self._doScatteredSlicing()
def _doScatteredSlicing(self):
leftIndex = self._findLeftIndex()
rightIndex = self._findRightIndex()
if self._bpSize() == 0:
rightIndex = leftIndex
self._startList = self._startList[leftIndex:rightIndex]
self._endList = self._endList[leftIndex:rightIndex]
if self._valList != None:
self._valList = self._valList[leftIndex:rightIndex]
if self._strandList != None:
self._strandList = self._strandList[leftIndex:rightIndex]
if self._idList != None:
self._idList = self._idList[leftIndex:rightIndex]
if self._edgesList != None:
self._edgesList = self._edgesList[leftIndex:rightIndex]
if self._weightsList != None:
self._weightsList = self._weightsList[leftIndex:rightIndex]
for key, extraList in self._extraLists.items():
self._extraLists[key] = extraList[leftIndex:rightIndex]
self._updateNumListElements()
def _doDenseSlicing(self, i, j):
if self._valList != None:
self._valList = self._valList[i:j]
if self._strandList != None:
self._strandList = self._strandList[i:j]
if self._idList != None:
self._idList = self._idList[i:j]
if self._edgesList != None:
self._edgesList = self._edgesList[i:j]
if self._weightsList != None:
self._weightsList = self._weightsList[i:j]
for key, extraList in self._extraLists.items():
self._extraLists[key] = extraList[i:j]
self._updateNumListElements()
def __getslice__(self, i, j):
slicedTV = TrackView(self.genomeAnchor, self._startList, self._endList, \
self._valList, self._strandList, self._idList, \
self._edgesList, self._weightsList, \
self.borderHandling, self.allowOverlaps, \
extraLists=self._extraLists)
slicedTV.trackFormat = self.trackFormat
slicedTV.genomeAnchor.start += i
if j>=0:
try:
slicedTV.genomeAnchor.end = min(self.genomeAnchor.end, self.genomeAnchor.start + j)
except FloatingPointError: # Caused by trackView[:] with self.genomeAnchor.start > 0
slicedTV.genomeAnchor.end = self.genomeAnchor.end
if j<0:
slicedTV.genomeAnchor.end += j
if self.trackFormat.reprIsDense():
slicedTV._doDenseSlicing(i,j)
else:
slicedTV._doScatteredSlicing()
return slicedTV
def _getBpLevelModificationArray(self, indexes, vals):
bpLevelMod = numpy.bincount(indexes, vals)
origLen = len(bpLevelMod)
bpLevelMod.resize(self._bpSize()+1)
bpLevelMod[origLen:] = 0
return bpLevelMod
def _commonGetBpLevelArray(self, vals):
if self.trackFormat.reprIsDense():
if self.allowOverlaps:
raise ShouldNotOccurError()
return vals
else:
bpLevelArray = numpy.zeros(self._bpSize()+1)
numElements = self.getNumElements()
if numElements > 0:
bpLevelArray += self._getBpLevelModificationArray(self.startsAsNumpyArray(), vals)
bpLevelArray -= self._getBpLevelModificationArray(self.endsAsNumpyArray(), vals)
bpLevelArray = bpLevelArray.cumsum()
return bpLevelArray[:-1]
def getBinaryBpLevelArray(self):
vals = numpy.ones(self.getNumElements(), dtype='int32')
return numpy.array(self._commonGetBpLevelArray(vals), dtype='bool8')
def getCoverageBpLevelArray(self):
vals = numpy.ones(self.getNumElements(), dtype='int32')
return numpy.array(self._commonGetBpLevelArray(vals), dtype='int32')
def getValueBpLevelArray(self, voidValue=0):
'''
Creates a bp-level function of any valued track. In case of scattered tracks,
uncovered aras are filled with voidValue (which would typically be set to 0 or numpy.nan).
In the case of overlapping regions, the values are added.'''
assert self.trackFormat.isValued('number'), self.trackFormat
vals = self.valsAsNumpyArray()
bpLevelArray = numpy.array(self._commonGetBpLevelArray(vals), dtype=vals.dtype)
if voidValue != 0:
bpLevelArray[~self.getBinaryBpLevelArray()] = voidValue
return bpLevelArray
def _removeBlindPassengersFromNumpyArray(self, numpyArray):
'''
To remove any blind passengers - segments entirely in front of genomeanchor,
but sorted after a larger segment crossing the border.
'''
if self.allowOverlaps and len(numpyArray) > 0:
numpyArray = numpyArray[numpy.where(self._endList > self.genomeAnchor.start)]
return numpyArray
def _commonAsNumpyArray(self, numpyArray, numpyArrayModMethod, name):
assert(self.borderHandling in ['crop'])
if numpyArray is None:
return None
numpyArray = self._removeBlindPassengersFromNumpyArray(numpyArray)
if numpyArrayModMethod is not None:
return numpyArrayModMethod(numpyArray)
else:
return numpyArray
def startsAsNumpyArray(self):
return self._commonAsNumpyArray(self._startList, self._startListModMethod, 'starts')
def _startListModMethod(self, startList):
return numpy.maximum(startList - self.genomeAnchor.start, \
numpy.zeros(len(startList), dtype='int32'))
def endsAsNumpyArray(self):
return self._commonAsNumpyArray(self._endList, self._endListModMethod, 'ends')
def _endListModMethod(self, endList):
return numpy.minimum(endList - self.genomeAnchor.start, \
numpy.zeros(len(endList), dtype='int32') + len(self.genomeAnchor))
def valsAsNumpyArray(self):
return self._commonAsNumpyArray(self._valList, None, 'vals')
def strandsAsNumpyArray(self):
return self._commonAsNumpyArray(self._strandList, None, 'strands')
def idsAsNumpyArray(self):
return self._commonAsNumpyArray(self._idList, None, 'ids')
def edgesAsNumpyArray(self):
return self._commonAsNumpyArray(self._edgesList, None, 'edges')
def weightsAsNumpyArray(self):
return self._commonAsNumpyArray(self._weightsList, None, 'weights')
def extrasAsNumpyArray(self, key):
assert self.hasExtra(key)
from functools import partial
return self._commonAsNumpyArray(self._extraLists[key], None, 'extras')
def allExtrasAsDictOfNumpyArrays(self):
return OrderedDict([(key,self.extrasAsNumpyArray(key)) for key in self._extraLists])
def hasExtra(self, key):
return key in self._extraLists
