Method test_symbol_basic

numpy/polynomial/tests/test_printing.py:424–458

(self)

            r'$x \mapsto 1.0\,{He}_{0}(x) + 2.0\,{He}_{1}(x) + 3.0\,{He}_{2}(x)$')

    def test_symbol_basic(self):
        # default input
        p = poly.Polynomial([1, 2, 3], symbol='z')
        assert_equal(self.as_latex(p),
            r'$z \mapsto 1.0 + 2.0\,z + 3.0\,z^{2}$')

        # translated input
        p = poly.Polynomial([1, 2, 3], domain=[-2, 0], symbol='z')
        assert_equal(
            self.as_latex(p),
            (
                r'$z \mapsto 1.0 + 2.0\,\left(1.0 + z\right) + 3.0\,'
                r'\left(1.0 + z\right)^{2}$'
            ),
        )

        # scaled input
        p = poly.Polynomial([1, 2, 3], domain=[-0.5, 0.5], symbol='z')
        assert_equal(
            self.as_latex(p),
            (
                r'$z \mapsto 1.0 + 2.0\,\left(2.0z\right) + 3.0\,'
                r'\left(2.0z\right)^{2}$'
            ),
        )

        # affine input
        p = poly.Polynomial([1, 2, 3], domain=[-1, 0], symbol='z')
        assert_equal(
            self.as_latex(p),
            (
                r'$z \mapsto 1.0 + 2.0\,\left(1.0 + 2.0z\right) + 3.0\,'
                r'\left(1.0 + 2.0z\right)^{2}$'
            ),
        )


SWITCH_TO_EXP = (