MeteoInfo 4.1 was released (2025-8-18)

• Add cape_cin, dry_lapse, moist_lapse and many other functions in meteolib package

• Add solve_ivp function in numeric package as ODE solver

• Add lambertw function in numeric package

• Add shapewrite in geolib package for writing shape file

• Add topelitz function in numeric package for create Topeliz matrix

• Add count_nonzero function in numeric package

• Support epsg projection code

• Update surf function with texturemap alpha support

• Update commons-imaging to version 1.0.0-alpha6

• Update netCDF to version 3.9.0

• Some bug fixed

solve_ivp example for Lorenz attractor

from mipylib.numeric.integrate import solve_ivp

# Create an image of the Lorenz attractor.

# Lorenz paramters and initial conditions.
sigma, beta, rho = 10, 2.667, 28
u0, v0, w0 = 0, 1, 1.05

# Maximum time point and total number of time points.
tmax, n = 100, 10000

def lorenz(t, X, sigma, beta, rho):
    """The Lorenz equations."""
    u, v, w = X
    up = -sigma*(u - v)
    vp = rho*u - v - u*w
    wp = -beta*w + u*v
    return up, vp, wp

# Integrate the Lorenz equations.
soln = solve_ivp(lorenz, (0, tmax), (u0, v0, w0), args=(sigma, beta, rho),
                 dense_output=True)
# Interpolate solution onto the time grid, t.
t = np.linspace(0, tmax, n)
x, y, z = soln.sol(t)

ax = axes3d(facecolor='k', aspect='equal', clip_plane=False)

# Make the line multi-coloured by plotting it in segments of length s which
# change in colour across the whole time series.
s = 10
colors = plt.makecolors(255, cmap='MPL_winter')
for i in range(0,n-s,s):
    ax.plot(x[i:i+s+1], y[i:i+s+1], z[i:i+s+1], color=colors[i*255/n],
        linewidth=3, alpha=0.4)

# Remove all the axis clutter, leaving just the curve.
ax.set_axis_off()