def find_spikes(tod, nsigma=10, width=15, padding=7, noise=None):
res = []
ftod = tod.reshape(-1, tod.shape[-1])
if noise is None: noise = estimate_white_noise(ftod)**0.5
for di, d in enumerate(ftod):
smooth = scipy.signal.medfilt(d, width)
bad = np.abs(d - smooth) > noise[di] * nsigma
bad = rangelist.Rangelist(bad)
bad = bad.widen(padding)
res.append(rangelist.Rangelist(bad))
res = rangelist.Multirange(res)
res.data.reshape(tod.shape[:-1])
return res
def find_jumps(tod,
bsize=100,
nsigma=10,
margin=50,
step=50,
margin_step=1000):
ndet = tod.shape[0]
cuts = []
for det, det_tod in enumerate(tod):
n = len(det_tod)
# Compute difference tod
dtod = det_tod[1:] - det_tod[:-1]
nsamp = dtod.size
# Find typical standard deviation
nblock = int(nsamp / bsize)
sigma = utils.medmean(
np.var(dtod[:nblock * bsize].reshape(nblock, bsize), -1))**0.5
# Look for samples that deviate too much from 0
bad = np.abs(dtod) > sigma * nsigma
bad = np.concatenate([bad[:1], bad])
# Look for steps, areas where the mean level changes dramatically on each
# side of the jump. First find the center of each bad region
steps = bad * 0
labels, nlabel = scipy.ndimage.label(bad)
centers = np.array(
scipy.ndimage.center_of_mass(bad, labels,
np.arange(nlabel + 1))).astype(int)[:,
0]
# Find mean to the left and right of each bad region
for i, pos in enumerate(centers):
m1 = np.mean(det_tod[max(0, pos -
step * 3 / 2):max(1, pos - step / 2)])
m2 = np.mean(det_tod[min(n - 2, pos +
step / 2):min(n - 1, pos + step * 3 / 2)])
if np.abs(m2 - m1) > sigma * nsigma:
steps[pos] = 1
#print centers.shape, np.sum(steps)
# Grow each cut by a margin
bad = scipy.ndimage.distance_transform_edt(1 - bad) <= margin
steps = scipy.ndimage.distance_transform_edt(1 - steps) <= margin_step
cuts.append(rangelist.Rangelist(bad | steps))
return rangelist.Multirange(cuts)
def to_rangelist(self):
ranges = self.to_ranges()
return rangelist.Multirange(
[rangelist.Rangelist(r, n=self.nsamp) for r in ranges])
"hor",
args.objname,
mjd,
site=scan.site)
visible = np.any(object_pos[1] >= margin)
if not visible:
cut = rangelist.zeros((d.ndet, d.nsamp))
else:
pmap = pmat.PmatMap(scan, mask, sys="hor:%s" % args.objname)
# Build a tod to project onto.
tod = np.zeros((d.ndet, d.nsamp), dtype=dtype)
# And project
pmap.forward(tod, mask)
# Any nonzero samples should be cut
tod = np.rint(tod)
cut = rangelist.Multirange([rangelist.Rangelist(t) for t in tod])
print "%s %6.4f %d" % (id, float(cut.sum()) / cut.size, visible)
mystats.append([ind, float(cut.sum()) / cut.size, visible])
# Write cuts to output directory
if args.persample:
files.write_cut("%s/%s.cuts" % (args.odir, id),
d.dets,
cut,
nrow=d.array_info.nrow,
ncol=d.array_info.ncol)
mystats = np.array(mystats)
stats = utils.allgatherv(mystats, comm)
if comm.rank == 0:
with open(args.odir + "/stats.txt", "w") as f:
for stat in stats:
f.write("%s %6.4f %d\n" %
def build_bins(a, nbin): box = np.array([np.min(a),np.max(a)]) return np.minimum(np.floor((a-box[0])/(box[1]-box[0])*nbin).astype(int),nbin-1) def bin_by_pix(a, pix, nbin): a = np.asarray(a) if a.ndim == 0: a = np.full(len(pix), a) fa = a.reshape(-1,a.shape[-1]) fo = np.zeros([fa.shape[0],nbin]) for i in range(len(fa)): fo[i] = np.bincount(pix, fa[i], minlength=nbin) return fo.reshape(a.shape[:-1]+(nbin,)) # Gapfill poltod in regions with far too few hits, to # avoid messing up the poltod power spectrum mask = poldiv[0,0] < np.mean(poldiv[0,0])*0.1 for i in range(poltod.shape[0]): poltod[i] = gapfill.gapfill_copy(poltod[i], rangelist.Rangelist(mask)) # Calc phase which is equal to az while az velocity is positive # and 2*max(az) - az while az velocity is negative x = np.arange(len(az)) az_spline = UnivariateSpline(x, az, s=1e-4) daz = az_spline.derivative(1)(x) ddaz = az_spline.derivative(2)(x) phase = az.copy() phase[daz<0] = 2*np.max(az)-az[daz<0] # Bin by az and phase apix = build_bins(az, nbin) ppix = build_bins(phase, nbin) for i, pix in enumerate([apix, ppix]): tod_eq.rhs[i] += bin_by_pix(polrhs, pix, nbin) tod_eq.div[i] += bin_by_pix(poldiv, pix, nbin)
def nocut(ndet, nsamp):
return rangelist.Multirange([
rangelist.Rangelist(np.zeros([0, 2], dtype=int), n=nsamp)
for i in range(ndet)
])
