f `matplotlib` is not installed

        .. plot::
            :scale: 75

            >>> from torch import randn, randint
            >>> from torchmetrics.classification import MulticlassPrecisionRecallCurve
            >>> preds = randn(20, 3).softmax(dim=-1)
            >>> target = randint(3, (20,))
            >>> metric = MulticlassPrecisionRecallCurve(num_classes=3)
            >>> metric.update(preds, target)
            >>> fig_, ax_ = metric.plot(score=True)

        Tr