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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def r_hat(self):
 """Get rhat data for the variable."""

        _, y_vals, values, colors = self.labels_ticks_and_vals()
        for y, value, color in zip(y_vals, values, colors):
            if value.ndim != 2 or value.shape[0] < 2:
                yield y, None, color
            else:
                yield y, _get_split_rhat(value), color