def append(self, x: np.ndarray, y: base.typing.Target):
"""Add a (single) sample to the specific class sample window.
x
1D-array of feature for a single sample.
y
The target data for a single sample. - will be associated with its target window
"""
if not self._is_initialized:
self._n_features = get_dimensions(x)[1]
self._configure()
if self._n_features != get_dimensions(x)[1]:
raise ValueError(
"Inconsistent number of features in X: {}, previously observed {}."
.format(get_dimensions(x)[1], self._n_features))
yIndex = self.classes.index(y) # Gets index of class element
self._X[yIndex, self._next_insert[yIndex], :] = x
slot_replaced = self._imask[yIndex, self._next_insert[yIndex]]
self._imask[yIndex, self._next_insert[yIndex]] = True
self._next_insert[yIndex] = (
self._next_insert[yIndex] +
1 if self._next_insert[yIndex] < self.window_size - 1 else 0
) # Postion oldest insert as newest
if not slot_replaced:
# This is not used after size == window - size of
self._size[yIndex] += 1
return self
def append(self, x: np.ndarray, y: base.typing.Target) -> "KNeighborsBuffer":
"""Add a (single) sample to the sample window.
x
1D-array of feature for a single sample.
y
The target data for a single sample.
Raises
------
ValueError: If at any moment, a sample with a different number of
attributes than that of the n_attributes parameter is passed, a
ValueError is raised.
TypeError: If the buffer type is altered by the user, or is not
correctly initialized, a TypeError may be raised.
"""
if not self._is_initialized:
self._n_features = get_dimensions(x)[1]
self._n_targets = get_dimensions(y)[1]
self._configure()
if self._n_features != get_dimensions(x)[1]:
raise ValueError(
"Inconsistent number of features in X: {}, previously observed {}.".format(
get_dimensions(x)[1], self._n_features
)
)
self._X[self._next_insert, :] = x
self._y[self._next_insert] = y
slot_replaced = self._imask[self._next_insert]
# Update the instance storing logic
self._imask[self._next_insert] = True # Mark slot as filled
self._next_insert = (
self._next_insert + 1 if self._next_insert < self.window_size - 1 else 0
)
if (
slot_replaced
): # The oldest sample was replaced (complete cycle in the buffer)
self._oldest = self._next_insert
else: # Actual buffer increased
self._size += 1
return self