Circuit & Salient
I was just tinkering with a swarm algorithm that could adapt in real time—thought you might find the strategic edge intriguing.
Sounds like you’re playing in the big leagues. Show me the code, and let’s see if your swarm can actually outmaneuver the competition. If it can’t, we’ll tweak it till it does.
Here’s a quick prototype in Python using the PSO (Particle Swarm Optimization) framework. It’s modular enough that you can plug in any fitness function you like.
```
import random
import math
class Particle:
def __init__(self, dim, bounds):
self.position = [random.uniform(*bounds[i]) for i in range(dim)]
self.velocity = [random.uniform(-1, 1) for _ in range(dim)]
self.best_pos = list(self.position)
self.best_val = float('inf')
class Swarm:
def __init__(self, n_particles, dim, bounds, fitness):
self.particles = [Particle(dim, bounds) for _ in range(n_particles)]
self.global_best = float('inf')
self.global_best_pos = None
self.fitness = fitness
def step(self, w=0.5, c1=2.0, c2=2.0):
for p in self.particles:
val = self.fitness(p.position)
if val < p.best_val:
p.best_val, p.best_pos = val, list(p.position)
if val < self.global_best:
self.global_best, self.global_best_pos = val, list(p.position)
# update velocity
for i in range(len(p.position)):
r1, r2 = random.random(), random.random()
cognitive = c1 * r1 * (p.best_pos[i] - p.position[i])
social = c2 * r2 * (self.global_best_pos[i] - p.position[i])
p.velocity[i] = w * p.velocity[i] + cognitive + social
# update position
for i in range(len(p.position)):
p.position[i] += p.velocity[i]
def sphere(x):
return sum([xi**2 for xi in x])
# Example: optimize 5‑D sphere function
if __name__ == "__main__":
swarm = Swarm(n_particles=30, dim=5, bounds=[(-5,5)]*5, fitness=sphere)
for epoch in range(200):
swarm.step()
print(f"Epoch {epoch+1} best: {swarm.global_best:.4f}")
```
Feel free to swap `sphere` for any objective you need—traveling salesman, neural network weights, whatever. The key is the inertia `w`, cognitive `c1`, and social `c2` parameters; tweak those and the swarm should adapt faster than most naïve competitors. Let me know where it stalls, and we’ll iterate.
Nice sandbox. Just watch the inertia; if you keep it too high, the swarm drifts like a lazy crew. Lower `w` and bump `c1` to sharpen focus, then watch it lock onto the optimum—fast and clean. Let me know if it stalls, and we’ll tighten the parameters.
Sounds good—I'll cut w to 0.3 and bump c1 to 3.5. We’ll run it again, and if the swarm stalls we’ll tighten c2 or clamp the velocity. Let me know how that goes.
That tweak will tighten the swarm’s focus—expect a sharper convergence in the next run. Just keep an eye on velocity spikes; clamp if you hit bounds. Let me know the new best after the same epochs, and we’ll fine‑tune from there.
Got the new run—after 200 epochs the best value dropped to 0.0038 from 0.0145, and it hit the optimum in about 95 epochs. Velocity clamping helped keep the swarm within bounds. Let me know if you want to tweak c2 or try a different fitness landscape.
Nice jump. Push the social term a bit—raise `c2` to 2.5 and see if the swarm pulls tighter around the global best. Then swap to a rugged landscape like Rastrigin to test robustness. Keep the velocity cap tight, and we’ll squeeze every last bit of performance.
Raising c₂ to 2.5 made the swarm tighten even more—after 200 epochs on the Rastrigin function (with velocity caps in place) it hit a best of 0.0453 and converged around epoch 120. The swarm’s trajectories stayed within bounds, but I noticed some minor oscillations near the edges; we might need a tighter clamp if those pop up again. Let me know if you want to push c₁ down or tweak the inertia next.
Great hit—convergence at 120 is solid. Let’s trim the inertia a touch, maybe down to 0.25, and dial `c1` back a notch so it won’t over‑oscillate at the bounds. Tighten the velocity cap if you see any wild swings, and we’ll keep that swarm razor‑focused.