PatchtTST and PatchTSMixer fixes (#28083)

* 🐛

 fix .max bug

* remove prediction_length from regression output dimensions

* fix parameter names, fix output names, update tests

* ensure shape for PatchTST

* ensure output shape for PatchTSMixer

* update model, batch, and expected for regression distribution test

* update test expected
Signed-off-by: Wesley M. Gifford <wmgifford@us.ibm.com>

* Update tests/models/patchtst/test_modeling_patchtst.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update tests/models/patchtst/test_modeling_patchtst.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update tests/models/patchtst/test_modeling_patchtst.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update src/transformers/models/patchtsmixer/modeling_patchtsmixer.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update tests/models/patchtsmixer/test_modeling_patchtsmixer.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update tests/models/patchtsmixer/test_modeling_patchtsmixer.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* standardize on patch_length
Signed-off-by: Wesley M. Gifford <wmgifford@us.ibm.com>

* Update tests/models/patchtsmixer/test_modeling_patchtsmixer.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update tests/models/patchtsmixer/test_modeling_patchtsmixer.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Make arguments more explicit
Signed-off-by: Wesley M. Gifford <wmgifford@us.ibm.com>

* adjust prepared inputs
Signed-off-by: Wesley M. Gifford <wmgifford@us.ibm.com>

---------
Signed-off-by: Wesley M. Gifford <wmgifford@us.ibm.com>
Co-authored-by: Wesley M. Gifford <wmgifford@us.ibm.com>
Co-authored-by: Kashif Rasul <kashif.rasul@gmail.com>
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

src/transformers/models/patchtsmixer/configuration_patchtsmixer.py

@@ -40,7 +40,7 @@ class PatchTSMixerConfig(PretrainedConfig):
     Args:
         context_length (`int`, *optional*, defaults to 32):
             The context/history length for the input sequence.
-        patch_len (`int`, *optional*, defaults to 8):
+        patch_length (`int`, *optional*, defaults to 8):
             The patch length for the input sequence.
         num_input_channels (`int`, *optional*, defaults to 1):
             Number of input variates. For Univariate, set it to 1.
@@ -51,7 +51,7 @@ class PatchTSMixerConfig(PretrainedConfig):
             The number of samples to generate in parallel for probabilistic forecast.
         d_model (`int`, *optional*, defaults to 8):
             Hidden dimension of the model. Recommended to set it as a multiple of patch_length (i.e. 2-5X of
-            patch_len). Larger value indicates more complex model.
+            patch_length). Larger value indicates more complex model.
         expansion_factor (`int`, *optional*, defaults to 2):
             Expansion factor to use inside MLP. Recommended range is 2-5. Larger value indicates more complex model.
         num_layers (`int`, *optional*, defaults to 3):
@@ -155,7 +155,7 @@ class PatchTSMixerConfig(PretrainedConfig):
         self,
         # Time series specific configuration
         context_length: int = 32,
-        patch_len: int = 8,
+        patch_length: int = 8,
         num_input_channels: int = 1,
         patch_stride: int = 8,
         num_parallel_samples: int = 100,
@@ -198,7 +198,7 @@ class PatchTSMixerConfig(PretrainedConfig):
     ):
         self.num_input_channels = num_input_channels
         self.context_length = context_length
-        self.patch_length = patch_len
+        self.patch_length = patch_length
         self.patch_stride = patch_stride
         self.d_model = d_model
         self.expansion_factor = expansion_factor
@@ -209,7 +209,7 @@ class PatchTSMixerConfig(PretrainedConfig):
         self.norm_mlp = norm_mlp
         self.scaling = scaling
         self.head_dropout = head_dropout
-        self.num_patches = (max(context_length, patch_len) - patch_len) // patch_stride + 1
+        self.num_patches = (max(context_length, patch_length) - patch_length) // patch_stride + 1
         self.mask_type = mask_type
         self.random_mask_ratio = random_mask_ratio
         self.num_forecast_mask_patches = num_forecast_mask_patches

src/transformers/models/patchtsmixer/modeling_patchtsmixer.py

@@ -888,7 +888,7 @@ def forecast_masking(
 
     Parameters:
         inputs (`torch.Tensor`):
-            Input of shape `(bs, num_channels, num_patch, patch_len)`
+            Input of shape `(bs, num_channels, num_patch, patch_length)`
         num_forecast_mask_patches (`list`):
             Number of patches to be masked at the end of each batch sample. e.g. 4 or [3, 5].
         unmasked_channel_indices (`list`, *optional*):
@@ -1864,15 +1864,15 @@ class PatchTSMixerForTimeSeriesClassification(PatchTSMixerPreTrainedModel):
     def forward(
         self,
         past_values: torch.Tensor,
-        future_values: torch.Tensor = None,
+        target_values: torch.Tensor = None,
         output_hidden_states: Optional[bool] = False,
         return_loss: bool = True,
         return_dict: Optional[bool] = None,
     ) -> PatchTSMixerForTimeSeriesClassificationOutput:
         r"""
-        future_values (`torch.FloatTensor` of shape `(batch_size, target_len, num_input_channels)` for forecasting,
+        target_values (`torch.FloatTensor` of shape `(batch_size, target_len, num_input_channels)` for forecasting,
             `(batch_size, num_targets)` for regression, or `(batch_size,)` for classification, *optional*): Target
-            values of the time series, that serve as labels for the model. The `future_values` is what the
+            values of the time series, that serve as labels for the model. The `target_values` is what the
             Transformer needs during training to learn to output, given the `past_values`. Note that, this is NOT
             required for a pretraining task.
 
@@ -1912,8 +1912,8 @@ class PatchTSMixerForTimeSeriesClassification(PatchTSMixerPreTrainedModel):
 
         y_hat = self.head(model_output.last_hidden_state)  # tensor [batch_size x n_labels]
 
-        if future_values is not None and return_loss is True:
-            loss_val = loss(y_hat, future_values)
+        if target_values is not None and return_loss is True:
+            loss_val = loss(y_hat, target_values)
         else:
             loss_val = None
 
@@ -1942,7 +1942,7 @@ class PatchTSMixerForRegressionOutput(ModelOutput):
     Output type of [`PatchTSMixerForRegressionOutput`].
 
     Args:
-        prediction_outputs (`torch.FloatTensor` of shape `(batch_size, num_targets)`):
+        regression_outputs (`torch.FloatTensor` of shape `(batch_size, num_targets)`):
             Prediction output from the regression head.
         last_hidden_state (`torch.FloatTensor` of shape `(batch_size, num_input_channels, num_patches, d_model)`):
             Backbone embeddings before passing through the head.
@@ -1953,7 +1953,7 @@ class PatchTSMixerForRegressionOutput(ModelOutput):
     """
 
     loss: Optional[torch.FloatTensor] = None
-    prediction_outputs: torch.FloatTensor = None
+    regression_outputs: torch.FloatTensor = None
     last_hidden_state: torch.FloatTensor = None
     hidden_states: Optional[Tuple[torch.FloatTensor]] = None
 
@@ -2054,15 +2054,15 @@ class PatchTSMixerForRegression(PatchTSMixerPreTrainedModel):
     def forward(
         self,
         past_values: torch.Tensor,
-        future_values: torch.Tensor = None,
+        target_values: torch.Tensor = None,
         output_hidden_states: Optional[bool] = False,
         return_loss: bool = True,
         return_dict: Optional[bool] = None,
     ) -> PatchTSMixerForRegressionOutput:
         r"""
-        future_values (`torch.FloatTensor` of shape `(batch_size, target_len, num_input_channels)` for forecasting,
+        target_values (`torch.FloatTensor` of shape `(batch_size, target_len, num_input_channels)` for forecasting,
             `(batch_size, num_targets)` for regression, or `(batch_size,)` for classification, *optional*): Target
-            values of the time series, that serve as labels for the model. The `future_values` is what the
+            values of the time series, that serve as labels for the model. The `target_values` is what the
             Transformer needs during training to learn to output, given the `past_values`. Note that, this is NOT
             required for a pretraining task.
 
@@ -2106,16 +2106,18 @@ class PatchTSMixerForRegression(PatchTSMixerPreTrainedModel):
 
         y_hat = self.head(model_output.last_hidden_state)  # [batch_size x num_targets]
 
-        if future_values is not None and return_loss is True:
+        if target_values is not None and return_loss is True:
             if self.distribution_output:
-                if self.distribution_output == "negative_binomial" and torch.any(future_values < 0):
-                    raise Exception("future_values cannot be negative for negative_binomial distribution.")
+                if self.distribution_output == "negative_binomial" and torch.any(target_values < 0):
+                    raise Exception("target_values cannot be negative for negative_binomial distribution.")
                 distribution = self.distribution_output.distribution(y_hat)
-                loss_val = loss(distribution, future_values)
+                # y_hat should be a 2-tuple, each with dimension [bs, num_targets]
+                y_hat = tuple([item.view(-1, self.config.num_targets) for item in y_hat])
+                loss_val = loss(distribution, target_values)
                 # take average of the loss
                 loss_val = weighted_average(loss_val)
             else:
-                loss_val = loss(y_hat, future_values)
+                loss_val = loss(y_hat, target_values)
         else:
             loss_val = None
 
@@ -2132,7 +2134,7 @@ class PatchTSMixerForRegression(PatchTSMixerPreTrainedModel):
 
         return PatchTSMixerForRegressionOutput(
             loss=loss_val,
-            prediction_outputs=y_hat,  # tensor [batch_size x num_targets]
+            regression_outputs=y_hat,  # tensor [batch_size x num_targets]
             last_hidden_state=model_output.last_hidden_state,  # [batch_size x nvars x num_patch x d_model]
             hidden_states=model_output.hidden_states,
         )
@@ -2146,7 +2148,7 @@ class PatchTSMixerForRegression(PatchTSMixerPreTrainedModel):
 
         Args:
             past_values (`torch.FloatTensor` of shape `(batch_size, sequence_length, num_input_channels)`):
-                Past values of the time series that serves as context in order to predict the future.
+                Past values of the time series that serves as context in order to predict the target values.
 
         Return:
             [`SamplePatchTSMixerRegressionOutput`] where the outputs `sequences` tensor will have shape `(batch_size,
@@ -2158,17 +2160,18 @@ class PatchTSMixerForRegression(PatchTSMixerPreTrainedModel):
         # get model output
         outputs = self(
             past_values=past_values,
-            future_values=None,
+            target_values=None,
             output_hidden_states=False,
         )
 
         # get distribution
-        distribution = self.distribution_output.distribution(outputs.prediction_outputs)
+        distribution = self.distribution_output.distribution(outputs.regression_outputs)
 
         # get samples
         samples = [
             distribution.sample() for _ in range(num_parallel_samples)
         ]  # samples: list of [batch_size x num_targets]
         # stack tensors
-        samples = torch.stack(samples, dim=1)  # [batch_size x num_samples x num_targets]
+        # [batch_size x num_samples x num_targets]
+        samples = torch.stack(samples, dim=1).view(-1, num_parallel_samples, self.config.num_targets)
         return SamplePatchTSMixerRegressionOutput(sequences=samples)

src/transformers/models/patchtst/modeling_patchtst.py

@@ -289,7 +289,7 @@ def forecast_masking(
 
     Parameters:
         inputs (`torch.Tensor`):
-            Input of shape `(bs, num_channels, num_patch, patch_len)`
+            Input of shape `(bs, num_channels, num_patch, patch_length)`
         num_forecast_mask_patches (`list`):
             Number of patches to be masked at the end of each batch sample. e.g. 4 or [3, 5].
         unmasked_channel_indices (`list`, *optional*):
@@ -1430,7 +1430,7 @@ class PatchTSTClassificationHead(nn.Module):
             pooled_embedding = embedding.mean(dim=2)
         elif self.pooling_type == "max":
             # pooled_embedding: [bs x num_channels x d_model]
-            pooled_embedding = embedding.max(dim=2)
+            pooled_embedding = embedding.max(dim=2).values
         else:
             raise ValueError(f"pooling operator {self.pooling_type} is not implemented yet")
         # pooled_embedding: bs x num_channels * d_model
@@ -1602,7 +1602,7 @@ class PatchTSTPredictionHead(nn.Module):
                 pooled_embedding = embedding.mean(dim=2)
             elif self.pooling_type == "max":
                 # pooled_embedding: [bs x num_channels x d_model]
-                pooled_embedding = embedding.max(dim=2)
+                pooled_embedding = embedding.max(dim=2).values
             else:
                 # pooled_embedding: [bs x num_channels x num_patches x d_model]
                 pooled_embedding = embedding
@@ -1866,7 +1866,7 @@ class PatchTSTRegressionHead(nn.Module):
             pooled_embedding = embedding.mean(dim=2)
         elif self.pooling_type == "max":
             # pooled_embedding: [bs x num_channels x d_model]
-            pooled_embedding = embedding.max(dim=2)
+            pooled_embedding = embedding.max(dim=2).values
         else:
             raise ValueError(f"pooling operator {self.pooling_type} is not implemented yet")
         # flatten the input
@@ -1899,11 +1899,11 @@ class PatchTSTForRegression(PatchTSTPreTrainedModel):
             self.distribution_output = None
         else:
             if config.distribution_output == "student_t":
-                self.distribution_output = StudentTOutput(dim=config.prediction_length * config.num_targets)
+                self.distribution_output = StudentTOutput(dim=config.num_targets)
             elif config.distribution_output == "normal":
-                self.distribution_output = NormalOutput(dim=config.prediction_length * config.num_targets)
+                self.distribution_output = NormalOutput(dim=config.num_targets)
             elif config.distribution_output == "negative_binomial":
-                self.distribution_output = NegativeBinomialOutput(dim=config.prediction_length * config.num_targets)
+                self.distribution_output = NegativeBinomialOutput(dim=config.num_targets)
             else:
                 raise ValueError(f"Unknown distribution output {config.distribution_output}")
 
@@ -1974,6 +1974,8 @@ class PatchTSTForRegression(PatchTSTPreTrainedModel):
         if target_values is not None:
             if self.distribution_output:
                 distribution = self.distribution_output.distribution(y_hat)
+                # y_hat should be a 2-tuple, each with dimension [bs, num_targets]
+                y_hat = tuple([item.view(-1, self.config.num_targets) for item in y_hat])
                 loss = nll(distribution, target_values)
                 # take average of the loss
                 loss = weighted_average(loss)
@@ -1982,6 +1984,7 @@ class PatchTSTForRegression(PatchTSTPreTrainedModel):
                 loss = loss(y_hat, target_values)
 
         if not return_dict:
+            # hidden_states, attentions, mask
             outputs = (y_hat,) + model_output[1:-3]
             outputs = (loss,) + outputs if loss is not None else outputs
             return outputs
@@ -2030,5 +2033,5 @@ class PatchTSTForRegression(PatchTSTPreTrainedModel):
         # get samples: list of [bs x num_targets]
         samples = [distribution.sample() for _ in range(num_parallel_samples)]
         # samples: [bs x num_samples x num_targets]
-        samples = torch.stack(samples, dim=1)
+        samples = torch.stack(samples, dim=1).view(-1, num_parallel_samples, self.config.num_targets)
         return SamplePatchTSTOutput(sequences=samples)

tests/models/patchtsmixer/test_modeling_patchtsmixer.py

@@ -191,11 +191,8 @@ class PatchTSMixerModelTester:
         # [bs x context_length x n_vars]
         past_values = floats_tensor([self.batch_size, _past_length, self.num_input_channels])
 
-        future_values = floats_tensor([self.batch_size, config.prediction_length, self.num_input_channels])
-
         inputs_dict = {
             "past_values": past_values,
-            "future_values": future_values,
         }
         return inputs_dict
 
@@ -256,21 +253,25 @@ class PatchTSMixerModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.Test
     def _prepare_for_class(self, inputs_dict, model_class, return_labels=False):
         inputs_dict = super()._prepare_for_class(inputs_dict, model_class, return_labels=return_labels)
 
-        # if classification model:
-        if model_class in get_values(MODEL_FOR_TIME_SERIES_CLASSIFICATION_MAPPING):
+        if model_class == PatchTSMixerForPrediction:
             rng = random.Random(self.model_tester.seed_number)
-            labels = ids_tensor([self.model_tester.batch_size], self.model_tester.num_targets, rng=rng)
-            # inputs_dict["labels"] = labels
+            labels = floats_tensor(
+                [
+                    self.model_tester.batch_size,
+                    self.model_tester.prediction_length,
+                    self.model_tester.num_input_channels,
+                ],
+                rng=rng,
+            )
             inputs_dict["future_values"] = labels
-            # inputs_dict.pop("future_values")
+        elif model_class in get_values(MODEL_FOR_TIME_SERIES_CLASSIFICATION_MAPPING):
+            rng = random.Random(self.model_tester.seed_number)
+            labels = ids_tensor([self.model_tester.batch_size], self.model_tester.num_targets, rng=rng)
+            inputs_dict["target_values"] = labels
         elif model_class in get_values(MODEL_FOR_TIME_SERIES_REGRESSION_MAPPING):
             rng = random.Random(self.model_tester.seed_number)
             labels = floats_tensor([self.model_tester.batch_size, self.model_tester.num_targets], rng=rng)
-            # inputs_dict["labels"] = labels
-            inputs_dict["future_values"] = labels
-            # inputs_dict.pop("future_values")
-        elif model_class in [PatchTSMixerModel, PatchTSMixerForPretraining]:
-            inputs_dict.pop("future_values")
+            inputs_dict["target_values"] = labels
 
         inputs_dict["output_hidden_states"] = True
         return inputs_dict
@@ -409,28 +410,37 @@ class PatchTSMixerModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.Test
             # signature.parameters is an OrderedDict => so arg_names order is deterministic
             arg_names = [*signature.parameters.keys()]
 
-            expected_arg_names_with_target = [
-                "past_values",
-                "observed_mask",
-                "future_values",
-                "output_hidden_states",
-                "return_loss",
-            ]
-            expected_arg_names_without_target = [
-                "past_values",
-                "observed_mask",
-                "output_hidden_states",
-            ]
-
-            expected_arg_names = expected_arg_names_with_target
             if model_class == PatchTSMixerForPretraining:
-                expected_arg_names = expected_arg_names_without_target + ["return_loss"]
-            if model_class == PatchTSMixerModel:
-                expected_arg_names = expected_arg_names_without_target
-            if model_class in get_values(MODEL_FOR_TIME_SERIES_CLASSIFICATION_MAPPING) or model_class in get_values(
+                expected_arg_names = [
+                    "past_values",
+                    "observed_mask",
+                    "output_hidden_states",
+                    "return_loss",
+                ]
+            elif model_class == PatchTSMixerModel:
+                expected_arg_names = [
+                    "past_values",
+                    "observed_mask",
+                    "output_hidden_states",
+                ]
+            elif model_class in get_values(MODEL_FOR_TIME_SERIES_CLASSIFICATION_MAPPING) or model_class in get_values(
                 MODEL_FOR_TIME_SERIES_REGRESSION_MAPPING
             ):
-                expected_arg_names.remove("observed_mask")
+                expected_arg_names = [
+                    "past_values",
+                    "target_values",
+                    "output_hidden_states",
+                    "return_loss",
+                ]
+            else:
+                # PatchTSMixerForPrediction
+                expected_arg_names = [
+                    "past_values",
+                    "observed_mask",
+                    "future_values",
+                    "output_hidden_states",
+                    "return_loss",
+                ]
 
             self.assertListEqual(arg_names[: len(expected_arg_names)], expected_arg_names)
 
@@ -686,20 +696,27 @@ class PatchTSMixerFunctionalTests(unittest.TestCase):
             else:
                 target_output = target_input
             ref_samples = target_output.unsqueeze(1).expand(-1, config.num_parallel_samples, -1, -1)
-
+            ground_truth_arg = "future_values"
+            output_predictions_arg = "prediction_outputs"
         elif task == "classification":
             mdl = PatchTSMixerForTimeSeriesClassification(config)
             target_input = self.__class__.correct_classification_classes
             target_output = self.__class__.correct_classification_output
+            ground_truth_arg = "target_values"
+            output_predictions_arg = "prediction_outputs"
         elif task == "regression":
             mdl = PatchTSMixerForRegression(config)
             target_input = self.__class__.correct_regression_output
             target_output = self.__class__.correct_regression_output
             ref_samples = target_output.unsqueeze(1).expand(-1, config.num_parallel_samples, -1)
+            ground_truth_arg = "target_values"
+            output_predictions_arg = "regression_outputs"
         elif task == "pretrain":
             mdl = PatchTSMixerForPretraining(config)
             target_input = None
             target_output = self.__class__.correct_pretrain_output
+            ground_truth_arg = None
+            output_predictions_arg = "prediction_outputs"
         else:
             print("invalid task")
 
@@ -710,15 +727,18 @@ class PatchTSMixerFunctionalTests(unittest.TestCase):
         else:
             output = mdl(
                 self.__class__.data,
-                future_values=target_input,
-                output_hidden_states=output_hidden_states,
+                **{
+                    ground_truth_arg: target_input,
+                    "output_hidden_states": output_hidden_states,
+                },
             )
 
-        if isinstance(output.prediction_outputs, tuple):
-            for t in output.prediction_outputs:
+        prediction_outputs = getattr(output, output_predictions_arg)
+        if isinstance(prediction_outputs, tuple):
+            for t in prediction_outputs:
                 self.assertEqual(t.shape, target_output.shape)
         else:
-            self.assertEqual(output.prediction_outputs.shape, target_output.shape)
+            self.assertEqual(prediction_outputs.shape, target_output.shape)
 
         self.assertEqual(output.last_hidden_state.shape, enc_output.shape)
 
@@ -980,7 +1000,7 @@ class PatchTSMixerFunctionalTests(unittest.TestCase):
         mdl = PatchTSMixerForTimeSeriesClassification(config)
         output = mdl(
             self.__class__.data,
-            future_values=self.__class__.correct_classification_classes,
+            target_values=self.__class__.correct_classification_classes,
         )
         self.assertEqual(
             output.prediction_outputs.shape,
@@ -994,7 +1014,7 @@ class PatchTSMixerFunctionalTests(unittest.TestCase):
         mdl = PatchTSMixerForTimeSeriesClassification(config)
         output = mdl(
             self.__class__.data,
-            future_values=self.__class__.correct_classification_classes,
+            target_values=self.__class__.correct_classification_classes,
             return_dict=False,
         )
         if isinstance(output, tuple):
@@ -1017,9 +1037,9 @@ class PatchTSMixerFunctionalTests(unittest.TestCase):
     def test_regression_full(self):
         config = PatchTSMixerConfig(**self.__class__.params)
         mdl = PatchTSMixerForRegression(config)
-        output = mdl(self.__class__.data, future_values=self.__class__.correct_regression_output)
+        output = mdl(self.__class__.data, target_values=self.__class__.correct_regression_output)
         self.assertEqual(
-            output.prediction_outputs.shape,
+            output.regression_outputs.shape,
             self.__class__.correct_regression_output.shape,
         )
         self.assertEqual(output.last_hidden_state.shape, self.__class__.enc_output.shape)
@@ -1030,13 +1050,13 @@ class PatchTSMixerFunctionalTests(unittest.TestCase):
         mdl = PatchTSMixerForRegression(config)
         output = mdl(
             self.__class__.data,
-            future_values=self.__class__.correct_regression_output,
+            target_values=self.__class__.correct_regression_output,
             return_dict=False,
         )
         if isinstance(output, tuple):
             output = PatchTSMixerForRegressionOutput(*output)
         self.assertEqual(
-            output.prediction_outputs.shape,
+            output.regression_outputs.shape,
             self.__class__.correct_regression_output.shape,
         )
         self.assertEqual(output.last_hidden_state.shape, self.__class__.enc_output.shape)
@@ -1049,13 +1069,13 @@ class PatchTSMixerFunctionalTests(unittest.TestCase):
         config = PatchTSMixerConfig(**params)
 
         mdl = PatchTSMixerForRegression(config)
-        output = mdl(self.__class__.data, future_values=self.__class__.correct_regression_output)
+        output = mdl(self.__class__.data, target_values=self.__class__.correct_regression_output)
         self.assertEqual(
-            output.prediction_outputs[0].shape,
+            output.regression_outputs[0].shape,
             self.__class__.correct_regression_output.shape,
         )
         self.assertEqual(
-            output.prediction_outputs[1].shape,
+            output.regression_outputs[1].shape,
             self.__class__.correct_regression_output.shape,
         )
         self.assertEqual(output.last_hidden_state.shape, self.__class__.enc_output.shape)
@@ -1075,13 +1095,13 @@ class PatchTSMixerFunctionalTests(unittest.TestCase):
         config = PatchTSMixerConfig(**params)
 
         mdl = PatchTSMixerForRegression(config)
-        output = mdl(self.__class__.data, future_values=self.__class__.correct_regression_output)
+        output = mdl(self.__class__.data, target_values=self.__class__.correct_regression_output)
         self.assertEqual(
-            output.prediction_outputs[0].shape,
+            output.regression_outputs[0].shape,
             self.__class__.correct_regression_output.shape,
         )
         self.assertEqual(
-            output.prediction_outputs[1].shape,
+            output.regression_outputs[1].shape,
             self.__class__.correct_regression_output.shape,
         )
         self.assertEqual(output.last_hidden_state.shape, self.__class__.enc_output.shape)

tests/models/patchtst/test_modeling_patchtst.py

@@ -367,19 +367,19 @@ class PatchTSTModelIntegrationTests(unittest.TestCase):
         self.assertTrue(torch.allclose(mean_prediction[0, -1:], expected_slice, atol=TOLERANCE))
 
     def test_regression_generation(self):
-        model = PatchTSTForRegression.from_pretrained("namctin/patchtst_etth1_regression").to(torch_device)
-        batch = prepare_batch(file="test-batch.pt")
+        model = PatchTSTForRegression.from_pretrained("ibm/patchtst-etth1-regression-distribution").to(torch_device)
+        batch = prepare_batch(repo_id="ibm/patchtst-etth1-test-data", file="regression_distribution_batch.pt")
 
         torch.manual_seed(0)
+        model.eval()
         with torch.no_grad():
             outputs = model.generate(past_values=batch["past_values"].to(torch_device))
         expected_shape = torch.Size((64, model.config.num_parallel_samples, model.config.num_targets))
         self.assertEqual(outputs.sequences.shape, expected_shape)
 
         expected_slice = torch.tensor(
-            [[0.3228, 0.4320, 0.4591, 0.4066, -0.3461, 0.3094, -0.8426]],
+            [[-0.08046409], [-0.06570087], [-0.28218266], [-0.20636195], [-0.11787311]],
             device=torch_device,
         )
         mean_prediction = outputs.sequences.mean(dim=1)
-
-        self.assertTrue(torch.allclose(mean_prediction[0, -1:], expected_slice, rtol=TOLERANCE))
+        self.assertTrue(torch.allclose(mean_prediction[-5:], expected_slice, rtol=TOLERANCE))