Created
June 18, 2020 19:17
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def my_adam_step(p, lr, mom, mom_damp, step, sqr_mom, sqr_damp, grad_avg, sqr_avg, eps, wd, **kwargs): | |
debias1 = debias(mom, mom_damp, step) | |
debias2 = debias(sqr_mom, sqr_damp, step) | |
grad_avg_debiased = grad_avg / debias1 | |
grad_var_debiased = sqr_avg / debias2 | |
p.data = p.data - lr * ((grad_avg_debiased) / (grad_var_debiased.sqrt() + eps) + wd * p.data) | |
return p | |
my_adam_step._defaults = dict(eps=1e-5, wd=0.) | |
def my_adam_opt(xtra_step=None, **kwargs): | |
return partial(StatefulOptimizer, steppers=[my_adam_step]+listify(xtra_step), | |
stats=[AverageGrad(dampening=True), AverageSqrGrad(), StepCount()], **kwargs) | |
for seed in (7, 42, 10914): | |
fix_seeds(seed) | |
learn,run = get_learn_run(nfs, data, 0.001, conv_layer, cbs=cbfs, opt_func=my_adam_opt(wd=1e-2)) | |
run.fit(10, learn) | |
print('-'*80) |
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