numpy.core._exceptions.UFuncTypeError: ufunc 'subtract' did not contain a loop with signature matching types (dtype('<U1'), dtype('<U1')) -> dtype('<U1') code example

Example: numpy.core._exceptions.UFuncTypeError: ufunc 'multiply' did not contain a loop with signature matching types (dtype(' dtype(' whatever by Evil Eagle on Nov 14 2020 Donate Comment

x = np.linspace(0., 9., 10)
a = float(raw_input('Acceleration ='))
v = float(raw_input('Velocity = '))
y=v*x-0.5*a*x**2