def getpeaks(self, sample):
from numarray import nonzero
from numarray.fft import real_fft
fft = abs(real_fft(sample))
# We compare each point to the point on either side - we must be
# greater than both.
# To do this, we left-shift and right-shift the array by one to
# compare.
peaks = nonzero((fft[1:-1] > fft[:-2]) * (fft[1:-1] > fft[2:]))
if not len(peaks) or not len(peaks[0]):
return ()
# Avoiding 'zip; sort; reverse' will give a big speedup.
try:
peakvals = zip(fft[1:-1].take(peaks)[0], peaks[0])
except:
print("pppp", peaks)
raise
peakvals.sort(); peakvals.reverse()
if len(peakvals) > 2:
(val1,ind1),(val2,ind2),(val3,ind3) = peakvals[:3]
# Peak 3 should be no more than 2/3 the size of peak 2
# For GSM/Speex mangled audio, peak3 is about 0.55 * peak2
# at the worst case.
if val2 > 1.5*val3:
# Add one to the index because we took [1:-1] before
return (ind2+1,ind1+1)
else:
return ()
elif len(peakvals) == 2:
(val2,ind2),(val1,ind1) = peakvals
# Add one to the index because we took [1:-1] before
return (ind2+1,ind1+1)
else:
(val1,ind1), = peakvals
return (ind1,0)
def getpeaks(self, sample):
from numarray import nonzero
from numarray.fft import real_fft
fft = abs(real_fft(sample))
# We compare each point to the point on either side - we must be
# greater than both.
# To do this, we left-shift and right-shift the array by one to
# compare.
peaks = nonzero((fft[1:-1] > fft[:-2]) * (fft[1:-1] > fft[2:]))
if not len(peaks) or not len(peaks[0]):
return ()
# Avoiding 'zip; sort; reverse' will give a big speedup.
try:
peakvals = zip(fft[1:-1].take(peaks)[0], peaks[0])
except:
print "pppp", peaks
raise
peakvals.sort(); peakvals.reverse()
if len(peakvals) > 2:
(val1,ind1),(val2,ind2),(val3,ind3) = peakvals[:3]
# Peak 3 should be no more than 2/3 the size of peak 2
# For GSM/Speex mangled audio, peak3 is about 0.55 * peak2
# at the worst case.
if val2 > 1.5*val3:
# Add one to the index because we took [1:-1] before
return (ind2+1,ind1+1)
else:
return ()
elif len(peakvals) == 2:
(val2,ind2),(val1,ind1) = peakvals
# Add one to the index because we took [1:-1] before
return (ind2+1,ind1+1)
else:
(val1,ind1), = peakvals
return (ind1,0)
def complement(ind_arr, n):
"""
Find the complement of the set of indices in ind_arr from
arange(n)
"""
mat = numarray.ones(n)
numarray.put(mat, ind_arr, 0)
out = numarray.nonzero(mat)
return out[0]
def locate(self, P1, P2, C):
# Find location that triggered testfunc and initialize testfunc to that index
val1 = (P1[0]-self.testfuncs[0].lower)*(self.testfuncs[0].upper-P1[0])
val2 = (P2[0]-self.testfuncs[0].lower)*(self.testfuncs[0].upper-P2[0])
ind = nonzero(val1*val2 < 0)
self.testfuncs[0].ind = ind
self.testfuncs[0].func = self.testfuncs[0].one
X, V = BifPoint.locate(self, P1, P2, C)
# Set testfunc back to monitoring all
self.testfuncs[0].ind = None
self.testfuncs[0].func = self.testfuncs[0].all
return X, V
#Fig.set_figsize_inches( (5.75, 4.3) )
Fig.set_size_inches( (8, 6) )
##print pylab.gca().get_position()
ax.set_position([0.13,
0.14,
0.775,
0.77])
Fig.savefig(outfilename+".eps")
Fig.savefig(outfilename+".png", dpi=300)
pylab.show()
### find the amount of time value exceeded 6
Threshold = 6.0
Exceed = len(N.nonzero(Etotal > Threshold)[0])
print "Number of hours Energy greater than %f : %i"%(Threshold, Exceed )
print "Fraction of total: %f"%(float(Exceed) / len(Etotal) )
### Rob Naim's numbers:
## Hs(m)/Tp(s)/peak orbital velocity (cm/s)
## 2/6/33
## 2/9/57
## 4/6/66
## 4/9/115
##data = [(2, 6),
## (2, 9),
## (4, 6),