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==Introduction==
In statistics, nonlinear transformation of variables is commonly used in
practice in regression problems. '''Alternating conditional expectations'''(ACE) is one of these method
to find those transformations that produce the best fitting
additive model. Knowledge of such transformations aids
in the interpretation and understanding of the relationship between
the response and predictors.
ACE transform the response variable ''Y'' and its predictor variables, ''x''<sub>''i''</sub>
==Mathematical Description==
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