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Python sympy.chebyshevt函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了Python中sympy.chebyshevt函数的典型用法代码示例。如果您正苦于以下问题：Python chebyshevt函数的具体用法？Python chebyshevt怎么用？Python chebyshevt使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了chebyshevt函数的11个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Python代码示例。

示例1: test_chebyshev

def test_chebyshev():
    assert chebyshevt(0, x) == 1
    assert chebyshevt(1, x) == x
    assert chebyshevt(2, x) == 2*x**2-1
    assert chebyshevt(3, x) == 4*x**3-3*x
    for n in range(1, 4):
        for k in range(n):
            z = chebyshevt_root(n, k)
            assert simplify(chebyshevt(n, z)) == 0
    for n in range(1, 4):
        for k in range(n):
            z = chebyshevu_root(n, k)
            assert simplify(chebyshevu(n, z)) == 0
开发者ID:tsarvey，项目名称:spinwaves，代码行数:13，代码来源:test_subs.py


示例2: test_manualintegrate_orthogonal_poly

def test_manualintegrate_orthogonal_poly():
    n = symbols('n')
    a, b = 7, S(5)/3
    polys = [jacobi(n, a, b, x), gegenbauer(n, a, x), chebyshevt(n, x),
        chebyshevu(n, x), legendre(n, x), hermite(n, x), laguerre(n, x),
        assoc_laguerre(n, a, x)]
    for p in polys:
        integral = manualintegrate(p, x)
        for deg in [-2, -1, 0, 1, 3, 5, 8]:
            # some accept negative "degree", some do not
            try:
                p_subbed = p.subs(n, deg)
            except ValueError:
                continue
            assert (integral.subs(n, deg).diff(x) - p_subbed).expand() == 0

        # can also integrate simple expressions with these polynomials
        q = x*p.subs(x, 2*x + 1)
        integral = manualintegrate(q, x)
        for deg in [2, 4, 7]:
            assert (integral.subs(n, deg).diff(x) - q.subs(n, deg)).expand() == 0

        # cannot integrate with respect to any other parameter
        t = symbols('t')
        for i in range(len(p.args) - 1):
            new_args = list(p.args)
            new_args[i] = t
            assert isinstance(manualintegrate(p.func(*new_args), t), Integral)
开发者ID:gamechanger98，项目名称:sympy，代码行数:28，代码来源:test_manual.py


示例3: test_jacobi

def test_jacobi():
    n = Symbol("n")
    a = Symbol("a")
    b = Symbol("b")

    assert jacobi(0, a, b, x) == 1
    assert jacobi(1, a, b, x) == a/2 - b/2 + x*(a/2 + b/2 + 1)

    assert jacobi(n, a, a, x) == RisingFactorial(a + 1, n)*gegenbauer(n, a + S(1)/2, x)/RisingFactorial(2*a + 1, n)
    assert jacobi(n, a, -a, x) == ((-1)**a*(-x + 1)**(-a/2)*(x + 1)**(a/2)*assoc_legendre(n, a, x)*
                                   factorial(-a + n)*gamma(a + n + 1)/(factorial(a + n)*gamma(n + 1)))
    assert jacobi(n, -b, b, x) == ((-x + 1)**(b/2)*(x + 1)**(-b/2)*assoc_legendre(n, b, x)*
                                   gamma(-b + n + 1)/gamma(n + 1))
    assert jacobi(n, 0, 0, x) == legendre(n, x)
    assert jacobi(n, S.Half, S.Half, x) == RisingFactorial(S(3)/2, n)*chebyshevu(n, x)/factorial(n + 1)
    assert jacobi(n, -S.Half, -S.Half, x) == RisingFactorial(S(1)/2, n)*chebyshevt(n, x)/factorial(n)

    X = jacobi(n, a, b, x)
    assert isinstance(X, jacobi)

    assert jacobi(n, a, b, -x) == (-1)**n*jacobi(n, b, a, x)
    assert jacobi(n, a, b, 0) == 2**(-n)*gamma(a + n + 1)*hyper((-b - n, -n), (a + 1,), -1)/(factorial(n)*gamma(a + 1))
    assert jacobi(n, a, b, 1) == RisingFactorial(a + 1, n)/factorial(n)

    m = Symbol("m", positive=True)
    assert jacobi(m, a, b, oo) == oo*RisingFactorial(a + b + m + 1, m)

    assert conjugate(jacobi(m, a, b, x)) == jacobi(m, conjugate(a), conjugate(b), conjugate(x))

    assert diff(jacobi(n,a,b,x), n) == Derivative(jacobi(n, a, b, x), n)
    assert diff(jacobi(n,a,b,x), x) == (a/2 + b/2 + n/2 + S(1)/2)*jacobi(n - 1, a + 1, b + 1, x)
开发者ID:StefenYin，项目名称:sympy，代码行数:31，代码来源:test_spec_polynomials.py


示例4: test_chebyshev

def test_chebyshev():
    raises(ValueError, 'chebyshevt(-1, x)')
    raises(ValueError, 'chebyshevu(-1, x)')
    assert chebyshevt(0, x) == 1
    assert chebyshevt(1, x) == x
    assert chebyshevt(2, x) == 2*x**2-1
    assert chebyshevt(3, x) == 4*x**3-3*x
    for n in range(1, 4):
        for k in range(n):
            z = chebyshevt_root(n, k)
            assert chebyshevt(n, z) == 0
        raises(ValueError, 'chebyshevt_root(n, n)')
    for n in range(1, 4):
        for k in range(n):
            z = chebyshevu_root(n, k)
            assert chebyshevu(n, z) == 0
        raises(ValueError, 'chebyshevu_root(n, n)')
开发者ID:ALGHeArT，项目名称:sympy，代码行数:17，代码来源:test_spec_polynomials.py


示例5: test_latex_functions

def test_latex_functions():
    assert latex(exp(x)) == "e^{x}"
    assert latex(exp(1) + exp(2)) == "e + e^{2}"

    f = Function("f")
    assert latex(f(x)) == "\\operatorname{f}{\\left (x \\right )}"

    beta = Function("beta")

    assert latex(beta(x)) == r"\beta{\left (x \right )}"
    assert latex(sin(x)) == r"\sin{\left (x \right )}"
    assert latex(sin(x), fold_func_brackets=True) == r"\sin {x}"
    assert latex(sin(2 * x ** 2), fold_func_brackets=True) == r"\sin {2 x^{2}}"
    assert latex(sin(x ** 2), fold_func_brackets=True) == r"\sin {x^{2}}"

    assert latex(asin(x) ** 2) == r"\operatorname{asin}^{2}{\left (x \right )}"
    assert latex(asin(x) ** 2, inv_trig_style="full") == r"\arcsin^{2}{\left (x \right )}"
    assert latex(asin(x) ** 2, inv_trig_style="power") == r"\sin^{-1}{\left (x \right )}^{2}"
    assert latex(asin(x ** 2), inv_trig_style="power", fold_func_brackets=True) == r"\sin^{-1} {x^{2}}"

    assert latex(factorial(k)) == r"k!"
    assert latex(factorial(-k)) == r"\left(- k\right)!"

    assert latex(subfactorial(k)) == r"!k"
    assert latex(subfactorial(-k)) == r"!\left(- k\right)"

    assert latex(factorial2(k)) == r"k!!"
    assert latex(factorial2(-k)) == r"\left(- k\right)!!"

    assert latex(binomial(2, k)) == r"{\binom{2}{k}}"

    assert latex(FallingFactorial(3, k)) == r"{\left(3\right)}_{\left(k\right)}"
    assert latex(RisingFactorial(3, k)) == r"{\left(3\right)}^{\left(k\right)}"

    assert latex(floor(x)) == r"\lfloor{x}\rfloor"
    assert latex(ceiling(x)) == r"\lceil{x}\rceil"
    assert latex(Min(x, 2, x ** 3)) == r"\min\left(2, x, x^{3}\right)"
    assert latex(Min(x, y) ** 2) == r"\min\left(x, y\right)^{2}"
    assert latex(Max(x, 2, x ** 3)) == r"\max\left(2, x, x^{3}\right)"
    assert latex(Max(x, y) ** 2) == r"\max\left(x, y\right)^{2}"
    assert latex(Abs(x)) == r"\lvert{x}\rvert"
    assert latex(re(x)) == r"\Re{x}"
    assert latex(re(x + y)) == r"\Re{x} + \Re{y}"
    assert latex(im(x)) == r"\Im{x}"
    assert latex(conjugate(x)) == r"\overline{x}"
    assert latex(gamma(x)) == r"\Gamma\left(x\right)"
    assert latex(Order(x)) == r"\mathcal{O}\left(x\right)"
    assert latex(lowergamma(x, y)) == r"\gamma\left(x, y\right)"
    assert latex(uppergamma(x, y)) == r"\Gamma\left(x, y\right)"

    assert latex(cot(x)) == r"\cot{\left (x \right )}"
    assert latex(coth(x)) == r"\coth{\left (x \right )}"
    assert latex(re(x)) == r"\Re{x}"
    assert latex(im(x)) == r"\Im{x}"
    assert latex(root(x, y)) == r"x^{\frac{1}{y}}"
    assert latex(arg(x)) == r"\arg{\left (x \right )}"
    assert latex(zeta(x)) == r"\zeta\left(x\right)"

    assert latex(zeta(x)) == r"\zeta\left(x\right)"
    assert latex(zeta(x) ** 2) == r"\zeta^{2}\left(x\right)"
    assert latex(zeta(x, y)) == r"\zeta\left(x, y\right)"
    assert latex(zeta(x, y) ** 2) == r"\zeta^{2}\left(x, y\right)"
    assert latex(dirichlet_eta(x)) == r"\eta\left(x\right)"
    assert latex(dirichlet_eta(x) ** 2) == r"\eta^{2}\left(x\right)"
    assert latex(polylog(x, y)) == r"\operatorname{Li}_{x}\left(y\right)"
    assert latex(polylog(x, y) ** 2) == r"\operatorname{Li}_{x}^{2}\left(y\right)"
    assert latex(lerchphi(x, y, n)) == r"\Phi\left(x, y, n\right)"
    assert latex(lerchphi(x, y, n) ** 2) == r"\Phi^{2}\left(x, y, n\right)"

    assert latex(Ei(x)) == r"\operatorname{Ei}{\left (x \right )}"
    assert latex(Ei(x) ** 2) == r"\operatorname{Ei}^{2}{\left (x \right )}"
    assert latex(expint(x, y) ** 2) == r"\operatorname{E}_{x}^{2}\left(y\right)"
    assert latex(Shi(x) ** 2) == r"\operatorname{Shi}^{2}{\left (x \right )}"
    assert latex(Si(x) ** 2) == r"\operatorname{Si}^{2}{\left (x \right )}"
    assert latex(Ci(x) ** 2) == r"\operatorname{Ci}^{2}{\left (x \right )}"
    assert latex(Chi(x) ** 2) == r"\operatorname{Chi}^{2}{\left (x \right )}"

    assert latex(jacobi(n, a, b, x)) == r"P_{n}^{\left(a,b\right)}\left(x\right)"
    assert latex(jacobi(n, a, b, x) ** 2) == r"\left(P_{n}^{\left(a,b\right)}\left(x\right)\right)^{2}"
    assert latex(gegenbauer(n, a, x)) == r"C_{n}^{\left(a\right)}\left(x\right)"
    assert latex(gegenbauer(n, a, x) ** 2) == r"\left(C_{n}^{\left(a\right)}\left(x\right)\right)^{2}"
    assert latex(chebyshevt(n, x)) == r"T_{n}\left(x\right)"
    assert latex(chebyshevt(n, x) ** 2) == r"\left(T_{n}\left(x\right)\right)^{2}"
    assert latex(chebyshevu(n, x)) == r"U_{n}\left(x\right)"
    assert latex(chebyshevu(n, x) ** 2) == r"\left(U_{n}\left(x\right)\right)^{2}"
    assert latex(legendre(n, x)) == r"P_{n}\left(x\right)"
    assert latex(legendre(n, x) ** 2) == r"\left(P_{n}\left(x\right)\right)^{2}"
    assert latex(assoc_legendre(n, a, x)) == r"P_{n}^{\left(a\right)}\left(x\right)"
    assert latex(assoc_legendre(n, a, x) ** 2) == r"\left(P_{n}^{\left(a\right)}\left(x\right)\right)^{2}"
    assert latex(laguerre(n, x)) == r"L_{n}\left(x\right)"
    assert latex(laguerre(n, x) ** 2) == r"\left(L_{n}\left(x\right)\right)^{2}"
    assert latex(assoc_laguerre(n, a, x)) == r"L_{n}^{\left(a\right)}\left(x\right)"
    assert latex(assoc_laguerre(n, a, x) ** 2) == r"\left(L_{n}^{\left(a\right)}\left(x\right)\right)^{2}"
    assert latex(hermite(n, x)) == r"H_{n}\left(x\right)"
    assert latex(hermite(n, x) ** 2) == r"\left(H_{n}\left(x\right)\right)^{2}"

    # Test latex printing of function names with "_"
    assert latex(polar_lift(0)) == r"\operatorname{polar\_lift}{\left (0 \right )}"
    assert latex(polar_lift(0) ** 3) == r"\operatorname{polar\_lift}^{3}{\left (0 \right )}"
开发者ID:kushal124，项目名称:sympy，代码行数:99，代码来源:test_latex.py


示例6: test_chebyshev

def test_chebyshev():

    assert chebyshevt(0, x) == 1
    assert chebyshevt(1, x) == x
    assert chebyshevt(2, x) == 2*x**2 - 1
    assert chebyshevt(3, x) == 4*x**3 - 3*x

    for n in range(1, 4):
        for k in range(n):
            z = chebyshevt_root(n, k)
            assert chebyshevt(n, z) == 0
        raises(ValueError, lambda: chebyshevt_root(n, n))

    for n in range(1, 4):
        for k in range(n):
            z = chebyshevu_root(n, k)
            assert chebyshevu(n, z) == 0
        raises(ValueError, lambda: chebyshevu_root(n, n))

    n = Symbol("n")
    X = chebyshevt(n, x)
    assert isinstance(X, chebyshevt)
    assert chebyshevt(n, -x) == (-1)**n*chebyshevt(n, x)
    assert chebyshevt(-n, x) == chebyshevt(n, x)

    assert chebyshevt(n, 0) == cos(pi*n/2)
    assert chebyshevt(n, 1) == 1

    assert conjugate(chebyshevt(n, x)) == chebyshevt(n, conjugate(x))

    assert diff(chebyshevt(n, x), x) == n*chebyshevu(n - 1, x)

    X = chebyshevu(n, x)
    assert isinstance(X, chebyshevu)

    assert chebyshevu(n, -x) == (-1)**n*chebyshevu(n, x)
    assert chebyshevu(-n, x) == -chebyshevu(n - 2, x)

    assert chebyshevu(n, 0) == cos(pi*n/2)
    assert chebyshevu(n, 1) == n + 1

    assert conjugate(chebyshevu(n, x)) == chebyshevu(n, conjugate(x))

    assert diff(chebyshevu(n, x), x) == \
        (-x*chebyshevu(n, x) + (n + 1)*chebyshevt(n + 1, x))/(x**2 - 1)
开发者ID:abhi98khandelwal，项目名称:sympy，代码行数:45，代码来源:test_spec_polynomials.py


示例7: test_J13

def test_J13():
    a = symbols('a', integer=True, negative=False)
    assert chebyshevt(a, -1) == (-1)**a
开发者ID:batya239，项目名称:sympy，代码行数:3，代码来源:test_wester.py


示例8: test_J12

def test_J12():
    assert simplify(chebyshevt(1008, x) - 2*x*chebyshevt(1007, x) + chebyshevt(1006, x)) == 0
开发者ID:batya239，项目名称:sympy，代码行数:2，代码来源:test_wester.py


示例9: test_latex_functions


#.........这里部分代码省略.........
    assert latex(Min(x, y)**2) == r"\min\left(x, y\right)^{2}"
    assert latex(Max(x, 2, x**3)) == r"\max\left(2, x, x^{3}\right)"
    assert latex(Max(x, y)**2) == r"\max\left(x, y\right)^{2}"
    assert latex(Abs(x)) == r"\left\lvert{x}\right\rvert"
    assert latex(re(x)) == r"\Re{x}"
    assert latex(re(x + y)) == r"\Re{x} + \Re{y}"
    assert latex(im(x)) == r"\Im{x}"
    assert latex(conjugate(x)) == r"\overline{x}"
    assert latex(gamma(x)) == r"\Gamma\left(x\right)"
    assert latex(Order(x)) == r"\mathcal{O}\left(x\right)"
    assert latex(lowergamma(x, y)) == r'\gamma\left(x, y\right)'
    assert latex(uppergamma(x, y)) == r'\Gamma\left(x, y\right)'

    assert latex(cot(x)) == r'\cot{\left (x \right )}'
    assert latex(coth(x)) == r'\coth{\left (x \right )}'
    assert latex(re(x)) == r'\Re{x}'
    assert latex(im(x)) == r'\Im{x}'
    assert latex(root(x, y)) == r'x^{\frac{1}{y}}'
    assert latex(arg(x)) == r'\arg{\left (x \right )}'
    assert latex(zeta(x)) == r'\zeta\left(x\right)'

    assert latex(zeta(x)) == r"\zeta\left(x\right)"
    assert latex(zeta(x)**2) == r"\zeta^{2}\left(x\right)"
    assert latex(zeta(x, y)) == r"\zeta\left(x, y\right)"
    assert latex(zeta(x, y)**2) == r"\zeta^{2}\left(x, y\right)"
    assert latex(dirichlet_eta(x)) == r"\eta\left(x\right)"
    assert latex(dirichlet_eta(x)**2) == r"\eta^{2}\left(x\right)"
    assert latex(polylog(x, y)) == r"\operatorname{Li}_{x}\left(y\right)"
    assert latex(
        polylog(x, y)**2) == r"\operatorname{Li}_{x}^{2}\left(y\right)"
    assert latex(lerchphi(x, y, n)) == r"\Phi\left(x, y, n\right)"
    assert latex(lerchphi(x, y, n)**2) == r"\Phi^{2}\left(x, y, n\right)"

    assert latex(elliptic_k(z)) == r"K\left(z\right)"
    assert latex(elliptic_k(z)**2) == r"K^{2}\left(z\right)"
    assert latex(elliptic_f(x, y)) == r"F\left(x\middle| y\right)"
    assert latex(elliptic_f(x, y)**2) == r"F^{2}\left(x\middle| y\right)"
    assert latex(elliptic_e(x, y)) == r"E\left(x\middle| y\right)"
    assert latex(elliptic_e(x, y)**2) == r"E^{2}\left(x\middle| y\right)"
    assert latex(elliptic_e(z)) == r"E\left(z\right)"
    assert latex(elliptic_e(z)**2) == r"E^{2}\left(z\right)"
    assert latex(elliptic_pi(x, y, z)) == r"\Pi\left(x; y\middle| z\right)"
    assert latex(elliptic_pi(x, y, z)**2) == \
        r"\Pi^{2}\left(x; y\middle| z\right)"
    assert latex(elliptic_pi(x, y)) == r"\Pi\left(x\middle| y\right)"
    assert latex(elliptic_pi(x, y)**2) == r"\Pi^{2}\left(x\middle| y\right)"

    assert latex(Ei(x)) == r'\operatorname{Ei}{\left (x \right )}'
    assert latex(Ei(x)**2) == r'\operatorname{Ei}^{2}{\left (x \right )}'
    assert latex(expint(x, y)**2) == r'\operatorname{E}_{x}^{2}\left(y\right)'
    assert latex(Shi(x)**2) == r'\operatorname{Shi}^{2}{\left (x \right )}'
    assert latex(Si(x)**2) == r'\operatorname{Si}^{2}{\left (x \right )}'
    assert latex(Ci(x)**2) == r'\operatorname{Ci}^{2}{\left (x \right )}'
    assert latex(Chi(x)**2) == r'\operatorname{Chi}^{2}{\left (x \right )}', latex(Chi(x)**2)

    assert latex(
        jacobi(n, a, b, x)) == r'P_{n}^{\left(a,b\right)}\left(x\right)'
    assert latex(jacobi(n, a, b, x)**2) == r'\left(P_{n}^{\left(a,b\right)}\left(x\right)\right)^{2}'
    assert latex(
        gegenbauer(n, a, x)) == r'C_{n}^{\left(a\right)}\left(x\right)'
    assert latex(gegenbauer(n, a, x)**2) == r'\left(C_{n}^{\left(a\right)}\left(x\right)\right)^{2}'
    assert latex(chebyshevt(n, x)) == r'T_{n}\left(x\right)'
    assert latex(
        chebyshevt(n, x)**2) == r'\left(T_{n}\left(x\right)\right)^{2}'
    assert latex(chebyshevu(n, x)) == r'U_{n}\left(x\right)'
    assert latex(
        chebyshevu(n, x)**2) == r'\left(U_{n}\left(x\right)\right)^{2}'
    assert latex(legendre(n, x)) == r'P_{n}\left(x\right)'
    assert latex(legendre(n, x)**2) == r'\left(P_{n}\left(x\right)\right)^{2}'
    assert latex(
        assoc_legendre(n, a, x)) == r'P_{n}^{\left(a\right)}\left(x\right)'
    assert latex(assoc_legendre(n, a, x)**2) == r'\left(P_{n}^{\left(a\right)}\left(x\right)\right)^{2}'
    assert latex(laguerre(n, x)) == r'L_{n}\left(x\right)'
    assert latex(laguerre(n, x)**2) == r'\left(L_{n}\left(x\right)\right)^{2}'
    assert latex(
        assoc_laguerre(n, a, x)) == r'L_{n}^{\left(a\right)}\left(x\right)'
    assert latex(assoc_laguerre(n, a, x)**2) == r'\left(L_{n}^{\left(a\right)}\left(x\right)\right)^{2}'
    assert latex(hermite(n, x)) == r'H_{n}\left(x\right)'
    assert latex(hermite(n, x)**2) == r'\left(H_{n}\left(x\right)\right)^{2}'

    theta = Symbol("theta", real=True)
    phi = Symbol("phi", real=True)
    assert latex(Ynm(n,m,theta,phi)) == r'Y_{n}^{m}\left(\theta,\phi\right)'
    assert latex(Ynm(n, m, theta, phi)**3) == r'\left(Y_{n}^{m}\left(\theta,\phi\right)\right)^{3}'
    assert latex(Znm(n,m,theta,phi)) == r'Z_{n}^{m}\left(\theta,\phi\right)'
    assert latex(Znm(n, m, theta, phi)**3) == r'\left(Z_{n}^{m}\left(\theta,\phi\right)\right)^{3}'

    # Test latex printing of function names with "_"
    assert latex(
        polar_lift(0)) == r"\operatorname{polar\_lift}{\left (0 \right )}"
    assert latex(polar_lift(
        0)**3) == r"\operatorname{polar\_lift}^{3}{\left (0 \right )}"

    assert latex(totient(n)) == r'\phi\left( n \right)'

    # some unknown function name should get rendered with \operatorname
    fjlkd = Function('fjlkd')
    assert latex(fjlkd(x)) == r'\operatorname{fjlkd}{\left (x \right )}'
    # even when it is referred to without an argument
    assert latex(fjlkd) == r'\operatorname{fjlkd}'
开发者ID:Ronn3y，项目名称:sympy，代码行数:101，代码来源:test_latex.py


示例10: test_J13

def test_J13():
    a = Symbol("a", integer=True, negative=False)
    assert chebyshevt(a, -1) == (-1)**a
开发者ID:jcockayne，项目名称:sympy-rkern，代码行数:3，代码来源:test_wester.py


示例11: test_J12

def test_J12():
    skip('takes too much time')
    assert simplify(chebyshevt(1008,x) - 2*x*chebyshevt(1007,x) + chebyshevt(1006,x)) == 0
开发者ID:jcockayne，项目名称:sympy-rkern，代码行数:3，代码来源:test_wester.py



注：本文中的sympy.chebyshevt函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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