def _bin_catalog_spatial_counts(lons, lats, n_poly, mask, idx_map, binx, biny):
"""
Returns a list of event counts as ndarray with shape (n_poly) where each value
represents the event counts within the polygon.
Using [:, :, 1] index of the mask, we store the mapping between the index of n_poly and
that polygon in the mask. Additionally, the polygons are ordered such that the index of n_poly
in the result corresponds to the index of the polygons.
We can make a structure that could contain both of these, but the trade-offs will need
to be compared against performance.
"""
ai, bi = binx, biny
# will return negative
idx = bin1d_vec(lons, ai)
idy = bin1d_vec(lats, bi)
# bin1d returns -1 if outside the region
# todo: think about how to change this behavior for less confusions, bc -1 is an actual value that can be chosen
bad = (idx == -1) | (idy == -1) | (mask[idy, idx] == 1)
# this can be memory optimized by keeping short list and storing index, only for case where n/2 events
event_counts = numpy.zeros(n_poly)
# selecting the indexes into polygons correspoding to lons and lats within the grid
hash_idx = idx_map[idy[~bad], idx[~bad]].astype(int)
# aggregate in counts
numpy.add.at(event_counts, hash_idx, 1)
return event_counts
def test_scalar_outside(self):
from csep.utils.calc import bin1d_vec
mbins = numpy.arange(5.95, 9, 0.1) # This gives bins from 5.95 to 8.95
idx = bin1d_vec(5.95, mbins, tol=0.00001, right_continuous=True)
self.assertEqual(idx, 0)
idx = bin1d_vec(6, mbins, tol=0.00001, right_continuous=True) # This would give 0: Which is fine.
self.assertEqual(idx, 0)
idx = bin1d_vec(5, mbins, tol=0.00001, right_continuous=True)
self.assertEqual(idx, -1)
idx = bin1d_vec(4, mbins, tol=0.00001, right_continuous=True)
self.assertEqual(idx, -1)
def magnitude_counts(self, mag_bins=None, tol=0.00001, retbins=False):
""" Computes the count of events within mag_bins
Args:
mag_bins: uses csep.utils.constants.CSEP_MW_BINS as default magnitude bins
retbins (bool): if this is true, return the bins used
Returns:
numpy.ndarray: showing the counts of hte events in each magnitude bin
"""
# todo: keep track of events that are ignored
if mag_bins is None:
try:
# a forecast is a type of region, but region does not need a magnitude
mag_bins = self.region.magnitudes
except AttributeError:
# use default magnitude bins from csep
mag_bins = CSEP_MW_BINS
self.region.magnitudes = mag_bins
self.region.num_mag_bins = len(mag_bins)
out = numpy.zeros(len(mag_bins))
if self.event_count == 0:
if retbins:
return (mag_bins, out)
else:
return out
idx = bin1d_vec(self.get_magnitudes(), mag_bins, tol=tol, right_continuous=True)
numpy.add.at(out, idx, 1)
if retbins:
return (mag_bins, out)
else:
return out
def test_bin1d_single_bin1(self):
data = [-1, 0, 2, 3, 1, 1.5, 1.0, 0.999999999999999]
bin_edges = [1]
# purposely leaving right_continous flag=False bc it should be forced in the bin1d_vec function
test = bin1d_vec(data, bin_edges)
expected = [-1, -1, 0, 0, 0, 0, 0, -1]
self.assertListEqual(test.tolist(), expected)
def _bin_catalog_spatio_magnitude_counts(lons,
lats,
mags,
n_poly,
mask,
idx_map,
binx,
biny,
mag_bins,
tol=0.00001):
"""
Returns a list of event counts as ndarray with shape (n_poly, n_cat) where each value
represents the event counts within the polygon.
Using [:, :, 1] index of the mask, we store the mapping between the index of n_poly and
that polygon in the mask. Additionally, the polygons are ordered such that the index of n_poly
in the result corresponds to the index of the polygons.
Eventually, we can make a structure that could contain both of these, but the trade-offs will need
to be compared against performance.
"""
# index in cartesian grid for events in data. note, this has a different index than the
# vector of polygons. this mapping is stored in [:,:,1] index of mask
# index in 2d grid
idx = bin1d_vec(lons, binx)
idy = bin1d_vec(lats, biny)
mag_idxs = bin1d_vec(mags, mag_bins, tol=tol, right_continuous=True)
# start with zero event counts in each bin
event_counts = numpy.zeros((n_poly, len(mag_bins)))
# does not seem that we can vectorize this part
skipped = []
for i in range(idx.shape[0]):
if not mask[idy[i], idx[i]] and idy[i] != -1 and idx[
i] != -1 and mag_idxs[i] != -1:
# getting spatial bin from mask
hash_idx = int(idx_map[idy[i], idx[i]])
mag_idx = mag_idxs[i]
# update event counts in that polygon
event_counts[(hash_idx, mag_idx)] += 1
else:
skipped.append((lons[i], lats[i], mags[i]))
return event_counts, skipped
def _build_bitmask_vec(self):
"""
same as build mask but using vectorized calls to bin1d
"""
# build bounding box of set of polygons based on origins
nd_origins = numpy.array([poly.origin for poly in self.polygons])
bbox = [(numpy.min(nd_origins[:, 0]), numpy.min(nd_origins[:, 1])),
(numpy.max(nd_origins[:, 0]), numpy.max(nd_origins[:, 1]))]
# get midpoints for hashing
midpoints = numpy.array([poly.centroid() for poly in self.polygons])
# compute nx and ny
nx = numpy.rint((bbox[1][0] - bbox[0][0]) / self.dh)
ny = numpy.rint((bbox[1][1] - bbox[0][1]) / self.dh)
# set up grid of bounding box
xs = self.dh * numpy.arange(nx + 1) + bbox[0][0]
ys = self.dh * numpy.arange(ny + 1) + bbox[0][1]
# set up mask array, 1 is index 0 is mask
a = numpy.ones([len(ys), len(xs), 2])
# set all indices to nan
a[:, :, 1] = numpy.nan
# bin1d returns the index of polygon within the cartesian grid
idx = bin1d_vec(midpoints[:, 0], xs)
idy = bin1d_vec(midpoints[:, 1], ys)
for i in range(len(self.polygons)):
a[idy[i], idx[i], 1] = int(i)
# build mask in dim=0; here masked values are 1. see note below.
if idx[i] >= 0 and idy[i] >= 0:
if self.poly_mask is not None:
# note: csep1 gridded forecast file format convention states that a "1" indicates a valid cell, which is the opposite
# of the masking criterion
if self.poly_mask[i] == 1:
a[idy[i], idx[i], 0] = 0
else:
a[idy[i], idx[i], 0] = 0
return a, xs, ys
def get_index_of(self, lons, lats):
""" Returns the index of lons, lats in self.polygons
Args:
lons: ndarray-like
lats: ndarray-like
Returns:
idx: ndarray-like
"""
idx = bin1d_vec(numpy.array(lons), self.xs)
idy = bin1d_vec(numpy.array(lats), self.ys)
if numpy.any(idx == -1) or numpy.any(idy == -1):
raise ValueError(
"at least one lon and lat pair contain values that are outside of the valid region."
)
if numpy.any(self.bbox_mask[idy, idx] == 1):
raise ValueError(
"at least one lon and lat pair contain values that are outside of the valid region."
)
return self.idx_map[idy, idx].astype(numpy.int)
def get_masked(self, lons, lats):
"""Returns bool array lons and lats are not included in the spatial region.
.. note:: The ordering of lons and lats should correspond to the ordering of the lons and lats in the data.
Args:
lons: array-like
lats: array-like
Returns:
idx: array-like
"""
idx = bin1d_vec(lons, self.xs)
idy = bin1d_vec(lats, self.ys)
# handles the case where values are outside of the region
bad_idx = numpy.where((idx == -1) | (idy == -1))
mask = self.bbox_mask[idy, idx].astype(bool)
# manually set values outside region
mask[bad_idx] = True
return mask
def _merge(self, bins, data):
# 1) current bins dont exist
if self.bins.size == 0:
self.bins = bins
self.data = np.zeros(len(self.bins))
idx = bin1d_vec(data, self.bins)
np.add.at(self.data, idx, 1)
return
# 2) new bins subset of current bins
if bins[0] >= self.bins[0] and bins[-1] <= self.bins[-1]:
idx = bin1d_vec(data, self.bins)
np.add.at(self.data, idx, 1)
return
# 3) new bins are outside current bins
if bins[0] < self.bins[0]:
bin_min = bins[0]
else:
bin_min = self.bins[0]
if bins[-1] > self.bins[-1]:
bin_max = bins[-1]
else:
bin_max = self.bins[-1]
# generate new bins
new_bins = np.arange(bin_min, bin_max + self.dh / 2, self.dh)
tmp_data = np.zeros(len(new_bins))
# merge new data to new bins
# get old bin locations relative to new bins
idx = bin1d_vec(self.bins, new_bins)
# add old data
tmp_data[idx] = self.data
self.data = tmp_data
idx = bin1d_vec(data, new_bins)
np.add.at(self.data, idx, 1)
self.bins = new_bins
return
def _bin_catalog_probability(lons, lats, n_poly, mask, idx_map, binx, biny):
"""
Returns a list of event counts as ndarray with shape (n_poly) where each value
represents the event counts within the polygon.
Using [:, :, 1] index of the mask, we store the mapping between the index of n_poly and
that polygon in the mask. Additionally, the polygons are ordered such that the index of n_poly
in the result corresponds to the index of the polygons.
We can make a structure that could contain both of these, but the trade-offs will need
to be compared against performance.
"""
ai, bi = binx, biny
# returns -1 if outside of the bbox
idx = bin1d_vec(lons, ai)
idy = bin1d_vec(lats, bi)
bad = (idx == -1) | (idy == -1) | (mask[idy, idx] == 1)
event_counts = numpy.zeros(n_poly)
# [:,:,1] is a mapping from the polygon array to cartesian grid
hash_idx = idx_map[idy[~bad], idx[~bad]].astype(int)
# dont accumulate just set to one for probability
event_counts[hash_idx] = 1
return event_counts
def get_magnitude_index(self, mags, tol=0.00001):
""" Returns the indices into the magnitude bins of selected magnitudes
Note: the right-most bin is treated as extending to infinity.
Args:
mags (array-like): list of magnitudes
Returns:
idm (array-like): indices corresponding to mags
Raises:
ValueError
"""
idm = bin1d_vec(mags, self.magnitudes, tol=tol, right_continuous=True)
if numpy.any(idm == -1):
raise ValueError("mags outside the range of forecast magnitudes.")
return idm
def test_upper_limit_not_continuous(self):
data = [30, 30, 30]
bin_edges = [0, 10, 20, 30]
test = bin1d_vec(data, bin_edges)
expected = [3, 3, 3]
self.assertListEqual(test.tolist(), expected)
def test_bin1d_vec2(self):
data = [0.9999999]
bin_edges = [0.8, 0.9, 1.0]
test = bin1d_vec(data, bin_edges)
expected = [1]
self.assertListEqual(test.tolist(), expected)
def get_mag_idx(self):
""" Return magnitude index from region magnitudes """
try:
return bin1d_vec(self.get_magnitudes(), self.region.magnitudes, tol=0.00001, right_continuous=True)
except AttributeError:
raise CSEPCatalogException("Cannot return magnitude index without self.region.magnitudes")
def test_bin1d_vec6(self):
data = [1189999.99999]
bin_edges = [1189999.9, 1190000.0, 1200000.0]
test = bin1d_vec(data, bin_edges)
expected = [0]
self.assertListEqual(test.tolist(), expected)
def test_bin1d_vec3(self):
data = [-118.9999999]
bin_edges = [-119.0, -118.9, -118.8]
test = bin1d_vec(data, bin_edges)
expected = [0]
self.assertListEqual(test.tolist(), expected)
def test_bin1d_vec(self):
data = [0.34, 0.35]
bin_edges = [0.33, 0.34, 0.35, 0.36]
test = bin1d_vec(data, bin_edges).tolist()
expected = [1, 2]
self.assertListEqual(test, expected)
def test_bin1d_vec9(self):
data = [-118.97999999]
bin_edges = [-119.0, -118.98, -118.96]
test = bin1d_vec(data, bin_edges)
expected = [1]
self.assertListEqual(test.tolist(), expected)
def test_bin1d_vec_int(self):
data = [1, 3, 5, 10, 20]
bin_edges = [0, 10, 20, 30]
test = bin1d_vec(data, bin_edges)
expected = [0, 0, 0, 1, 2]
self.assertListEqual(test.tolist(), expected)
def test_less_and_greater_than(self):
data = [-1, 35, 40]
bin_edges = [0, 10, 20, 30]
test = bin1d_vec(data, bin_edges)
expected = [-1, 3, -1]
self.assertListEqual(test.tolist(), expected)
def test_lower_limit(self):
data = [0]
bin_edges = [0, 10, 20, 30]
test = bin1d_vec(data, bin_edges)
expected = [0]
self.assertListEqual(test.tolist(), expected)
