def deserialize_ridge_regressor(model_dict):
model = Ridge(model_dict["params"])
model.coef_ = np.array(model_dict["coef_"])
if "n_iter_" in model_dict:
model.n_iter_ = np.array(model_dict["n_iter_"])
if isinstance(model_dict["intercept_"], list):
model.intercept_ = np.array(model_dict["intercept_"])
else:
model.intercept_ = float(model_dict["intercept_"])
return model
def deserialize_ridge_regressor(model_dict):
model = Ridge(model_dict['params'])
model.coef_ = np.array(model_dict['coef_'])
if 'n_iter_' in model_dict:
model.n_iter_ = np.array(model_dict['n_iter_'])
if isinstance(model_dict['intercept_'], list):
model.intercept_ = np.array(model_dict['intercept_'])
else:
model.intercept_ = float(model_dict['intercept_'])
return model
def explain_instance(self,
neighborhood_data,
neighborhood_weights,
neighborhood_labels,
label,
num_features,
feature_selection,
simple_model=None):
if simple_model is None:
simple_model = Ridge(alpha=1,
fit_intercept=True,
random_state=self.random_state)
assert type(
simple_model
) in BaseLIME.MODELS, f'Invalid simple_model type choose from: {BaseLIME.MODELS}'
if simple_model.random_state != self.random_state:
warnings.warn(
'random_state of a simple_model is not equal to LIME random_state!'
)
labels_column = neighborhood_labels[:, label]
used_features = self._feature_selection(neighborhood_data,
labels_column,
neighborhood_weights,
num_features,
feature_selection)
# makes sure that weights are not passed in multiclass classification
simple_model = clone(simple_model)
simple_model.fit(neighborhood_data[:, used_features],
labels_column,
sample_weight=neighborhood_weights)
prediction_score = simple_model.score(
neighborhood_data[:, used_features],
labels_column,
sample_weight=neighborhood_weights)
local_pred = simple_model.predict(
neighborhood_data[0, used_features].reshape(1, -1))
if type(simple_model) in [
DecisionTreeRegressor, RandomForestRegressor
]:
feature_importance = sorted(zip(used_features,
simple_model.feature_importances_),
key=lambda x: np.abs(x[1]),
reverse=True)
simple_model.intercept_ = np.zeros(neighborhood_labels.shape[1])
else:
feature_importance = sorted(
zip(used_features, simple_model.coef_),
# key=lambda x: np.abs(x[1]), reverse=True)
# Changed to take into account only positive coefficients
key=lambda x: x[1],
reverse=True)
return (simple_model.intercept_, feature_importance, prediction_score,
local_pred)
model.addLayer(DenseLayer(7, LinearActivation()))
model.initialize(QuadraticCost())
ridge = Ridge(alpha=0.1)
# load model parameters
path1 = './model/my_model_W_{}.dat'
path2 = './model/my_model_b_{}.dat'
path3 = './model/my_model_ridge_W.dat'
path4 = './model/my_model_ridge_intercept.dat'
model_W, model_b, model_ridge_W, model_ridge_intercept = load_model(
4, path1, path2, path3, path4)
# update the model
for i in range(len(model.layers)):
model.layers[i].W = model_W[i]
model.layers[i].b = model_b[i]
ridge.coef_ = model_ridge_W
ridge.intercept_ = model_ridge_intercept[0]
# get the data point
inputlist = ball_tracking()
# predict the configuration
tar_position_in_list = list(ridge.predict(model.predict(inputlist)))
for i in range(len(joint_names)):
tar_position[joint_names[i]] = tar_position_in_list[i]
while True:
cur_pos = limb.joint_angles()
for key, value in tar_position.iteritems():
error_new[key] = tar_position[key] - cur_pos[key]
derror[key] = error_new[key] - error_old[key]