ANL-CEEESA/MIPLearn
1
0
Fork 0
mirror of https://github.com/ANL-CEEESA/MIPLearn.git synced 2025-12-06 09:28:51 -06:00
Code Issues Packages Projects Releases Wiki Activity

Knapsack: Make jitter relative instead of absolute

Browse Source
This commit is contained in:
Alinson S. Xavier
2020-02-21 11:19:24 -06:00
parent cae1915660
commit d7131e9f66
3 changed files with 17 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
miplearn/problems/tests/test_knapsack.py
View File

@@ -23,32 +23,3 @@ def test_knapsack_generator():
assert round(np.mean(w_sum), -1) == 500.
assert round(np.mean(p_sum), -1) == 1250.
assert round(np.mean(b_sum), -3) == 25000.
def test_knapsack_fixed_weights_jitter():
gen = MultiKnapsackGenerator(n=randint(low=50, high=51),
m=randint(low=10, high=11),
w=randint(low=0, high=1000),
K=randint(low=500, high=501),
u=uniform(loc=1.0, scale=0.0),
alpha=uniform(loc=0.50, scale=0.0),
fix_w=True,
w_jitter=randint(low=0, high=1),
)
instances = gen.generate(100)
w = [instance.weights[0,0] for instance in instances]
assert np.std(w) == 0.
gen = MultiKnapsackGenerator(n=randint(low=1, high=2),
m=randint(low=10, high=11),
w=randint(low=1000, high=1001),
K=randint(low=500, high=501),
u=uniform(loc=1.0, scale=0.0),
alpha=uniform(loc=0.50, scale=0.0),
fix_w=True,
w_jitter=randint(low=0, high=1001),
)
instances = gen.generate(5_000)
w = [instance.weights[0,0] for instance in instances]
assert round(np.std(w), -1) == 290.
assert round(np.mean(w), -2) == 1500.