def findSteepestDirRotateClasses(self, howmany, LOO = False):
working_set = pyrandom.sample(range(self.size), self.size)
Y = self.Y[working_set]
R = self.R[ix_(working_set, working_set)]
RY = self.RY[working_set]
Y_Schur_RY = self.Y_Schur_RY[working_set]
minus_diagRx2 = self.minus_diagRx2[working_set]
classvec = self.classvec[working_set]
size = len(working_set)
cython_mmc.findSteepestDirRotateClasses(Y,
R,
RY,
Y_Schur_RY,
self.classFitnessRowVec,
minus_diagRx2,
self.classcounts,
classvec,
size,
self.labelcount,
howmany,
self.sqrtR,
self.sqrtR.shape[1])
self.Y[working_set] = Y
self.RY[working_set] = RY
self.Y_Schur_RY[working_set] = Y_Schur_RY
self.classvec[working_set] = classvec
return
def findSteepestDirRotateClasses(self, howmany, LOO = False):
#print self.Y.shape,self.R.shape, self.RY.shape, self.Y_Schur_RY.shape, self.classFitnessRowVec.shape, self.mdiagRx2.shape, self.classcounts.shape, self.classvec.shape
cython_mmc.findSteepestDirRotateClasses(self.Y,
self.R,
self.RY,
self.Y_Schur_RY,
self.classFitnessRowVec,
self.mdiagRx2,
self.classcounts,
self.classvec,
self.size,
self.labelcount,
howmany,
self.sqrtR,
self.sqrtR.shape[1])
return
#The slow python code. Use the above cython instead.
for newclazz in range(self.labelcount):
#!!!!!!!!!!!!!!!
takenum = (self.size / self.labelcount) - self.classcounts[newclazz] + int(howmany)
for h in range(takenum):
dirsneg = self.classFitnessRowVec + (2 * self.mdiagRx2[:, None] + 4 * multiply(self.Y, self.RY))
dirsnegdiff = dirsneg - self.classFitnessRowVec
dirscc = dirsnegdiff[arange(self.size), self.classvec].T
dirs = dirsnegdiff + dirscc
dirs[arange(self.size), self.classvec] = float('Inf')
dirs = dirs[:, newclazz]
steepestdir = argmin(dirs)
steepness = amin(dirs)
oldclazz = self.classvec[steepestdir]
self.Y[steepestdir, oldclazz] = -1.
self.Y[steepestdir, newclazz] = 1.
self.classvec[steepestdir] = newclazz
self.classcounts[oldclazz] = self.classcounts[oldclazz] - 1
self.classcounts[newclazz] = self.classcounts[newclazz] + 1
self.RY[:, oldclazz] = self.RY[:, oldclazz] - 2 * self.R[:, steepestdir]
self.RY[:, newclazz] = self.RY[:, newclazz] + 2 * self.R[:, steepestdir]
for i in range(self.labelcount):
YTRY_i = self.Y[:,i].T * self.RY[:,i]
fitness_i = self.size - YTRY_i
self.classFitnessRowVec[i] = fitness_i[0, 0]
self.updateA()
#self.callback()
return False
def findSteepestDirRotateClasses_(self, howmany, LOO=False):
cython_mmc.findSteepestDirRotateClasses(
self.Y, self.R, self.RY, self.Y_Schur_RY, self.classFitnessRowVec,
self.minus_diagRx2, self.classcounts, self.classvec, self.size,
self.labelcount, howmany, self.sqrtR, self.sqrtR.shape[1])
return
#The slow python code. Use the above cython instead.
for newclazz in range(self.labelcount):
#!!!!!!!!!!!!!!!
takenum = (self.size / self.labelcount
) - self.classcounts[newclazz] + int(howmany)
for h in range(takenum):
dirsneg = self.classFitnessRowVec + (
2 * self.minus_diagRx2[:, None] +
4 * multiply(self.Y, self.RY))
dirsnegdiff = dirsneg - self.classFitnessRowVec
dirscc = dirsnegdiff[arange(self.size), self.classvec].T
dirs = dirsnegdiff + dirscc
dirs[arange(self.size), self.classvec] = float('Inf')
dirs = dirs[:, newclazz]
steepestdir = argmin(dirs)
steepness = amin(dirs)
oldclazz = self.classvec[steepestdir]
self.Y[steepestdir, oldclazz] = -1.
self.Y[steepestdir, newclazz] = 1.
self.classvec[steepestdir] = newclazz
self.classcounts[oldclazz] = self.classcounts[oldclazz] - 1
self.classcounts[newclazz] = self.classcounts[newclazz] + 1
self.RY[:,
oldclazz] = self.RY[:,
oldclazz] - 2 * self.R[:,
steepestdir]
self.RY[:,
newclazz] = self.RY[:,
newclazz] + 2 * self.R[:,
steepestdir]
for i in range(self.labelcount):
YTRY_i = self.Y[:, i].T * self.RY[:, i]
fitness_i = self.size - YTRY_i
self.classFitnessRowVec[i] = fitness_i[0, 0]
self.updateA()
#self.callback()
return False
def findSteepestDirRotateClasses(self, howmany, LOO=False):
working_set = pyrandom.sample(range(self.size), self.size)
Y = self.Y[working_set]
R = self.R[ix_(working_set, working_set)]
RY = self.RY[working_set]
Y_Schur_RY = self.Y_Schur_RY[working_set]
minus_diagRx2 = self.minus_diagRx2[working_set]
classvec = self.classvec[working_set]
size = len(working_set)
cython_mmc.findSteepestDirRotateClasses(
Y, R, RY, Y_Schur_RY, self.classFitnessRowVec, minus_diagRx2,
self.classcounts, classvec, size, self.labelcount, howmany,
self.sqrtR, self.sqrtR.shape[1])
self.Y[working_set] = Y
self.RY[working_set] = RY
self.Y_Schur_RY[working_set] = Y_Schur_RY
self.classvec[working_set] = classvec
return
