torcheval.metrics.WeightedCalibration

class torcheval.metrics.WeightedCalibration(*, num_tasks: int = 1, device: Optional[device] = None)

Compute weighted calibration metric. When weight is not provided, it calculates the unweighted calibration. Its functional version is torcheval.metrics.functional.weighted_calibration().

weighted_calibration = sum(input * weight) / sum(target * weight)

Parameters:num_tasks (int) – Number of tasks that need WeightedCalibration calculations. Default value is 1. Raises:ValueError – If value of weight is neither a float nor a int nor a torch.Tensor that matches the input tensor size.

Examples:

>>> import torch
>>> from torcheval.metrics import WeightedCalibration
>>> metric = WeightedCalibration()
>>> metric.update(torch.tensor([0.8, 0.4, 0.3, 0.8, 0.7, 0.6]),torch.tensor([1, 1, 0, 0, 1, 0]))
>>> metric.compute()
tensor([1.2], dtype=torch.float64)

>>> metric = WeightedCalibration()
>>> metric.update(torch.tensor([0.8, 0.4, 0.3, 0.8, 0.7, 0.6]),torch.tensor([1, 1, 0, 0, 1, 0]), torch.tensor([0.5, 1., 2., 0.4, 1.3, 0.9]))
>>> metric.compute()
tensor([1.1321], dtype=torch.float64)

>>> metric = WeightedCalibration(num_tasks=2)
>>> metric.update(torch.tensor([[0.8, 0.4], [0.8, 0.7]]),torch.tensor([[1, 1], [0, 1]]),)
>>> metric.compute()
tensor([0.6000, 1.5000], dtype=torch.float64)

__init__(*, num_tasks: int = 1, device: Optional[device] = None) → None

Initialize a metric object and its internal states.

Use self._add_state() to initialize state variables of your metric class. The state variables should be either torch.Tensor, a list of torch.Tensor, or a dictionary with torch.Tensor as values

Methods

__init__(*[, num_tasks, device])	Initialize a metric object and its internal states.
compute()	Return the weighted calibration.
load_state_dict(state_dict[, strict])	Loads metric state variables from state_dict.
merge_state(metrics)	Merge the metric state with its counterparts from other metric instances.
reset()	Reset the metric state variables to their default value.
state_dict()	Save metric state variables in state_dict.
to(device, *args, **kwargs)	Move tensors in metric state variables to device.
update(input, target[, weight])	Update the metric state with the total sum of weighted inputs and the total sum of weighted labels.

Attributes

device

The last input device of Metric.to().