[Matplotlib-users] Set a 3-D point?

[Prahas D. N. <pra...@gm...>]

Hi Mat-Plotters,

I'm trying to modify the below code so that I can
set the initial conditions to (-1,0,0.5).

The code below randomly sets the initial conditions:

**************

# I changed the equation -- it's not Lorenz.

N_trajectories = 1

def lorentz_deriv((x, y, z), t0, aa=1.1, yy=0.87):
    """Compute the time-derivative of a Lorentz system."""
    return [y*(z-1+x*x)+yy*x, x*(3*z+1-x*x)+yy*y, -2*z*(aa+x*y)]

# Choose random starting points, uniformly distributed from -15 to 15

np.random.seed(1)

*# Here's the statement which assigns the initial conditions:*

x0 = -15 + 30 * np.random.random((N_trajectories, 3))

******************

I tried simply doing this:

x0 = (-1,0,0.5)

but I get this error:

ValueError: need more than 1 value to unpack


What am I missing?  What is the correct way to make the assignment?


Thanks!


--Prahas