private function buildMin(Dataset $dataset): self
    {
        $this->min = new Quartile(min(...$dataset->ordinates()));

        return $this;
    }
private function buildMin(Dataset $dataset): self
    {
        $this->min = new Quartile(min(...$dataset->ordinates()));

        return $this;
    }
private function buildMin ( Dataset $ dataset ) : self { $ this -> min = new Quartile ( min ( ... $ dataset -> ordinates ( ) ) ) ; return $ this ; }
Extract the minimum value from the dataset

@param Dataset $dataset

@return self
Extract the minimum value from the dataset