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[ENH] Add parameters and similarity measures to tSNE #2510

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Merged
lanzagar merged 2 commits into from
Jan 19, 2018
Merged

[ENH] Add parameters and similarity measures to tSNE #2510

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a65302d
OWManifold: Add missing parameters to tSNE
pavlin-policar Jan 12, 2018
554d55d
OWManifold: Update settings to match sklearn defaults, change limits …
pavlin-policar Jan 19, 2018
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24 changes: 21 additions & 3 deletions Orange/widgets/unsupervised/owmanifoldlearning.py
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Original file line number Diff line number Diff line change
Expand Up @@ -93,11 +93,29 @@ class TSNEParametersEditor(ManifoldParametersEditor):
# rename l2 to Euclidean
metric_values = [("l2", "Euclidean")] + metric_values

perplexity = Setting(30)
early_exaggeration = Setting(12)
learning_rate = Setting(200)
n_iter = Setting(1000)

init_index = Setting(0)
init_values = [("pca", "PCA"), ("random", "Random")]

def __init__(self, parent):
super().__init__(parent)

self.metric_combo = self._create_combo_parameter(
"metric", "Metric:")
self.parameters["init"] = "pca"
self.perplexity_spin = self._create_spin_parameter(
"perplexity", 1, 100, "Perplexity:")
self.early_exaggeration_spin = self._create_spin_parameter(
"early_exaggeration", 1, 100, "Early exaggeration:")
self.lr_spin = self._create_spin_parameter(
"learning_rate", 1, 1000, "Learning rate:")
self.n_iter_spin = self._create_spin_parameter(
"n_iter", 250, 1e5, "Max iterations:")
self.init_radio = self._create_radio_parameter(
"init", "Initialization:")


class MDSParametersEditor(ManifoldParametersEditor):
Expand Down Expand Up @@ -276,14 +294,14 @@ def apply(self):
self.Error.out_of_memory()
except np.linalg.linalg.LinAlgError as e:
self.Error.manifold_error(str(e))

self.Outputs.transformed_data.send(out)

def get_method_parameters(self, data, method):
parameters = dict(n_components=self.n_components)
parameters.update(self.params_widget.parameters)
if data is not None and data.is_sparse() and method == TSNE:
parameters.update(method='exact',
init='random')
parameters.update(method='exact', init='random')
return parameters

def send_report(self):
Expand Down