def heatmap(self, x: str, y: str, options: str = '', title: str = '',
                label: str = '') -> object:
        """
        Documentation link: http://support.sas.com/documentation/cdl/en/grstatproc/67909/HTML/default/viewer.htm#n0w12m4cn1j5c6n12ak64u1rys4w.htm

        :param x: x variable
        :param y: y variable
        :param options: display options (string)
        :param title: graph title
        :param label:
        :return:
        """
        code = "proc sgplot data=%s.%s %s;" % (self.libref, self.table, self._dsopts())
        if len(options):
            code += "\n\theatmap x=%s y=%s / %s;" % (x, y, options)
        else:
            code += "\n\theatmap x=%s y=%s;" % (x, y)

        if len(label) > 0:
            code += " LegendLABEL='" + label + "'"
        code += ";\n"
        if len(title) > 0:
            code += "\ttitle '%s';\n" % title
        code += "run;\ntitle;"

        if self.sas.nosub:
            print(code)
            return

        ll = self._is_valid()
        if not ll:
            html = self.HTML
            self.HTML = 1
            ll = self.sas._io.submit(code)
            self.HTML = html
        if not self.sas.batch:
            self.sas.DISPLAY(self.sas.HTML(ll['LST']))
        else:
            return ll
Documentation link: http://support.sas.com/documentation/cdl/en/grstatproc/67909/HTML/default/viewer.htm#n0w12m4cn1j5c6n12ak64u1rys4w.htm

        :param x: x variable
        :param y: y variable
        :param options: display options (string)
        :param title: graph title
        :param label:
        :return: