def _gather_points(self):
"""
Collects the data points that are within the bounds of the plot and
caches them.
"""
if self._cache_valid:
return
if not self.index or not self.value:
return
index = self.index.get_data()
varray = self._trace_data
if varray.size == 0:
self._cached_data_pts = []
self._cached_valid = True
return
coordinates = self.yindex.get_data()
if self.fast_clip:
coord_min = float(coordinates[0])
coord_max = coordinates[-1]
slice_min = max(0,ceil((varray.shape[0]-1)*(self.value_range.low - coord_min)/(coord_max - coord_min)))
slice_max = min(varray.shape[0], 1+floor((varray.shape[0]-1)*(self.value_range.high - coord_min)/(coord_max - coord_min)))
varray = varray[slice_min:slice_max]
# FIXME: The y coordinates must also be sliced to match varray.
# Check to see if the data is completely outside the view region.
outside = False
# Check x coordinates.
low, high = self.index.get_bounds()
if low > self.index_range.high or high < self.index_range.low:
outside = True
# Check y coordinates. Use varray because it is nased on the yindex,
# but has been shifted up or down depending on the values.
ylow, yhigh = varray.min(), varray.max()
if ylow > self.value_range.high or yhigh < self.value_range.low:
outside = True
if outside:
self._cached_data_pts = []
self._cached_valid = True
return
if len(index) == 0 or varray.shape[0] == 0 or varray.shape[1] == 0 \
or len(index) != varray.shape[1]:
self._cached_data_pts = []
self._cache_valid = True
return
size_diff = varray.shape[1] - len(index)
if size_diff > 0:
warnings.warn('Chaco.LinePlot: value.shape[1] %d - len(index) %d = %d\n' \
% (varray.shape[1], len(index), size_diff))
index_max = len(index)
varray = varray[:,:index_max]
else:
index_max = varray.shape[1]
index = index[:index_max]
# Split the index and value raw data into non-NaN chunks.
# nan_mask is a boolean M by N array.
nan_mask = invert(isnan(varray)) & invert(isnan(index))
blocks_list = []
for nm in nan_mask:
blocks = [b for b in arg_find_runs(nm, "flat") if nm[b[0]] != 0]
blocks_list.append(blocks)
line_points = []
for k, blocks in enumerate(blocks_list):
points = []
for block in blocks:
start, end = block
block_index = index[start:end]
block_value = varray[k, start:end]
index_mask = self.index_mapper.range.mask_data(block_index)
runs = [r for r in arg_find_runs(index_mask, "flat") \
if index_mask[r[0]] != 0]
# Check to see if our data view region is between two points in the
# index data. If so, then we have to reverse map our current view
# into the appropriate index and draw the bracketing points.
if runs == []:
data_pt = self.map_data((self.x_mapper.low_pos, self.y_mapper.low_pos))
if self.index.sort_order == "none":
indices = argsort(index)
sorted_index = take(index, indices)
sorted_value = take(varray[k], indices)
sort = 1
else:
sorted_index = index
sorted_value = varray[k]
if self.index.sort_order == "ascending":
sort = 1
else:
sort = -1
ndx = bin_search(sorted_index, data_pt, sort)
if ndx == -1:
# bin_search can return -1 if data_pt is outside the bounds
# of the source data
continue
z = transpose(array((sorted_index[ndx:ndx+2],
sorted_value[ndx:ndx+2])))
points.append(z)
else:
# Expand the width of every group of points so we draw the lines
# up to their next point, outside the plot area
data_end = len(index_mask)
for run in runs:
start, end = run
if start != 0:
start -= 1
if end != data_end:
end += 1
run_data = transpose(array((block_index[start:end],
block_value[start:end])))
points.append(run_data)
line_points.append(points)
self._cached_data_pts = line_points
self._cache_valid = True
return
def _gather_points(self):
"""
Collects the data points that are within the bounds of the plot and
caches them.
"""
if self._cache_valid:
return
if not self.index or not self.value:
return
index = self.index.get_data()
varray = self._trace_data
if varray.size == 0:
self._cached_data_pts = []
self._cached_valid = True
return
coordinates = self.yindex.get_data()
if self.fast_clip:
coord_min = float(coordinates[0])
coord_max = coordinates[-1]
slice_min = max(
0,
ceil((varray.shape[0] - 1) *
(self.value_range.low - coord_min) /
(coord_max - coord_min)))
slice_max = min(
varray.shape[0],
1 + floor((varray.shape[0] - 1) *
(self.value_range.high - coord_min) /
(coord_max - coord_min)))
varray = varray[slice_min:slice_max]
# FIXME: The y coordinates must also be sliced to match varray.
# Check to see if the data is completely outside the view region.
outside = False
# Check x coordinates.
low, high = self.index.get_bounds()
if low > self.index_range.high or high < self.index_range.low:
outside = True
# Check y coordinates. Use varray because it is nased on the yindex,
# but has been shifted up or down depending on the values.
ylow, yhigh = varray.min(), varray.max()
if ylow > self.value_range.high or yhigh < self.value_range.low:
outside = True
if outside:
self._cached_data_pts = []
self._cached_valid = True
return
if len(index) == 0 or varray.shape[0] == 0 or varray.shape[1] == 0 \
or len(index) != varray.shape[1]:
self._cached_data_pts = []
self._cache_valid = True
return
size_diff = varray.shape[1] - len(index)
if size_diff > 0:
warnings.warn('Chaco.LinePlot: value.shape[1] %d - len(index) %d = %d\n' \
% (varray.shape[1], len(index), size_diff))
index_max = len(index)
varray = varray[:, :index_max]
else:
index_max = varray.shape[1]
index = index[:index_max]
# Split the index and value raw data into non-NaN chunks.
# nan_mask is a boolean M by N array.
nan_mask = invert(isnan(varray)) & invert(isnan(index))
blocks_list = []
for nm in nan_mask:
blocks = [b for b in arg_find_runs(nm, "flat") if nm[b[0]] != 0]
blocks_list.append(blocks)
line_points = []
for k, blocks in enumerate(blocks_list):
points = []
for block in blocks:
start, end = block
block_index = index[start:end]
block_value = varray[k, start:end]
index_mask = self.index_mapper.range.mask_data(block_index)
runs = [r for r in arg_find_runs(index_mask, "flat") \
if index_mask[r[0]] != 0]
# Check to see if our data view region is between two points in the
# index data. If so, then we have to reverse map our current view
# into the appropriate index and draw the bracketing points.
if runs == []:
data_pt = self.map_data(
(self.x_mapper.low_pos, self.y_mapper.low_pos))
if self.index.sort_order == "none":
indices = argsort(index)
sorted_index = take(index, indices)
sorted_value = take(varray[k], indices)
sort = 1
else:
sorted_index = index
sorted_value = varray[k]
if self.index.sort_order == "ascending":
sort = 1
else:
sort = -1
ndx = bin_search(sorted_index, data_pt, sort)
if ndx == -1:
# bin_search can return -1 if data_pt is outside the bounds
# of the source data
continue
z = transpose(
array((sorted_index[ndx:ndx + 2],
sorted_value[ndx:ndx + 2])))
points.append(z)
else:
# Expand the width of every group of points so we draw the lines
# up to their next point, outside the plot area
data_end = len(index_mask)
for run in runs:
start, end = run
if start != 0:
start -= 1
if end != data_end:
end += 1
run_data = transpose(
array((block_index[start:end],
block_value[start:end])))
points.append(run_data)
line_points.append(points)
self._cached_data_pts = line_points
self._cache_valid = True
return
def _gather_points(self):
"""
Collects the data points that are within the bounds of the plot and
caches them.
"""
if not self._cache_valid:
if not self.index or not self.value:
return
index = self.index.get_data()
value = self.value.get_data()
# Check to see if the data is completely outside the view region
for ds, rng in ((self.index, self.index_range), (self.value, self.value_range)):
low, high = ds.get_bounds()
if low > rng.high or high < rng.low:
self._cached_data_pts = []
self._cached_valid = True
return
if len(index) == 0 or len(value) == 0 or len(index) != len(value):
self._cached_data_pts = []
self._cache_valid = True
size_diff = len(value) - len(index)
if size_diff > 0:
warnings.warn('Chaco.LinePlot: len(value) %d - len(index) %d = %d\n' \
% (len(value), len(index), size_diff))
index_max = len(index)
value = value[:index_max]
else:
index_max = len(value)
index = index[:index_max]
# TODO: restore the functionality of rendering highlighted portions
# of the line
#selection = self.index.metadata.get(self.metadata_name, None)
#if selection is not None and type(selection) in (ndarray, list) and \
# len(selection) > 0:
# Split the index and value raw data into non-NaN chunks
nan_mask = invert(isnan(value)) & invert(isnan(index))
blocks = [b for b in arg_find_runs(nan_mask, "flat") if nan_mask[b[0]] != 0]
points = []
for block in blocks:
start, end = block
block_index = index[start:end]
block_value = value[start:end]
index_mask = self.index_mapper.range.mask_data(block_index)
runs = [r for r in arg_find_runs(index_mask, "flat") \
if index_mask[r[0]] != 0]
# Check to see if our data view region is between two points in the
# index data. If so, then we have to reverse map our current view
# into the appropriate index and draw the bracketing points.
if runs == []:
data_pt = self.map_data((self.x_mapper.low_pos, self.y_mapper.low_pos))
if self.index.sort_order == "none":
indices = argsort(index)
sorted_index = take(index, indices)
sorted_value = take(value, indices)
sort = 1
else:
sorted_index = index
sorted_value = value
if self.index.sort_order == "ascending":
sort = 1
else:
sort = -1
ndx = bin_search(sorted_index, data_pt, sort)
if ndx == -1:
# bin_search can return -1 if data_pt is outside the bounds
# of the source data
continue
points.append(transpose(array((sorted_index[ndx:ndx+2],
sorted_value[ndx:ndx+2]))))
else:
# Expand the width of every group of points so we draw the lines
# up to their next point, outside the plot area
data_end = len(index_mask)
for run in runs:
start, end = run
if start != 0:
start -= 1
if end != data_end:
end += 1
run_data = transpose(array((block_index[start:end],
block_value[start:end])))
points.append(run_data)
self._cached_data_pts = points
self._cache_valid = True
return
def _gather_points(self):
"""
Collects the data points that are within the bounds of the plot and
caches them.
"""
if not self._cache_valid:
if not self.index or not self.value:
return
index = self.index.get_data()
value = self.value.get_data()
# Check to see if the data is completely outside the view region
for ds, rng in ((self.index, self.index_range),
(self.value, self.value_range)):
low, high = ds.get_bounds()
if low > rng.high or high < rng.low:
self._cached_data_pts = []
self._cached_valid = True
return
if len(index) == 0 or len(value) == 0 or len(index) != len(value):
self._cached_data_pts = []
self._cache_valid = True
size_diff = len(value) - len(index)
if size_diff > 0:
warnings.warn('Chaco.LinePlot: len(value) %d - len(index) %d = %d\n' \
% (len(value), len(index), size_diff))
index_max = len(index)
value = value[:index_max]
else:
index_max = len(value)
index = index[:index_max]
# TODO: restore the functionality of rendering highlighted portions
# of the line
#selection = self.index.metadata.get(self.metadata_name, None)
#if selection is not None and type(selection) in (ndarray, list) and \
# len(selection) > 0:
# Split the index and value raw data into non-NaN chunks
nan_mask = invert(isnan(value)) & invert(isnan(index))
blocks = [
b for b in arg_find_runs(nan_mask, "flat")
if nan_mask[b[0]] != 0
]
points = []
for block in blocks:
start, end = block
block_index = index[start:end]
block_value = value[start:end]
index_mask = self.index_mapper.range.mask_data(block_index)
runs = [r for r in arg_find_runs(index_mask, "flat") \
if index_mask[r[0]] != 0]
# Check to see if our data view region is between two points in the
# index data. If so, then we have to reverse map our current view
# into the appropriate index and draw the bracketing points.
if runs == []:
data_pt = self.map_data(
(self.x_mapper.low_pos, self.y_mapper.low_pos))
if self.index.sort_order == "none":
indices = argsort(index)
sorted_index = take(index, indices)
sorted_value = take(value, indices)
sort = 1
else:
sorted_index = index
sorted_value = value
if self.index.sort_order == "ascending":
sort = 1
else:
sort = -1
ndx = bin_search(sorted_index, data_pt, sort)
if ndx == -1:
# bin_search can return -1 if data_pt is outside the bounds
# of the source data
continue
points.append(
transpose(
array((sorted_index[ndx:ndx + 2],
sorted_value[ndx:ndx + 2]))))
else:
# Expand the width of every group of points so we draw the lines
# up to their next point, outside the plot area
data_end = len(index_mask)
for run in runs:
start, end = run
if start != 0:
start -= 1
if end != data_end:
end += 1
run_data = (block_index[start:end],
block_value[start:end])
run_data = column_stack(run_data)
points.append(run_data)
self._cached_data_pts = points
self._cache_valid = True
return
