>
> my cost goes up in second RBM, 
>
i run DBM for another dataset that is not binary dataset (288 samples and 
68 features ) , i configure DBM for 3 RBMs and in first RBM cost is 
negative and near the zero but in following RBMs after some some epochs 
goes up,

Pre-training layer 0, epoch 39, cost  -1.30379824713
Pre-training layer 0, epoch 40, cost  -0.674643076956
Pre-training layer 0, epoch 41, cost  -1.48084717803
Pre-training layer 0, epoch 42, cost  -1.76803759113
Pre-training layer 0, epoch 43, cost  0.273725342005
Pre-training layer 0, epoch 44, cost  -0.303800804541
Pre-training layer 0, epoch 45, cost  -0.87795483321
Pre-training layer 0, epoch 46, cost  -1.71051587909
Pre-training layer 0, epoch 47, cost  -0.543049808592
Pre-training layer 0, epoch 48, cost  -2.21504936367
Pre-training layer 0, epoch 49, cost  -0.274728699587
Pre-training layer 1, epoch 0, cost  -59.4798035622
Pre-training layer 1, epoch 1, cost  -44.4995112419
Pre-training layer 1, epoch 2, cost  -41.2528500557
Pre-training layer 1, epoch 3, cost  -36.692761302
Pre-training layer 1, epoch 4, cost  -33.7153443098
Pre-training layer 1, epoch 5, cost  -25.3340663612
Pre-training layer 1, epoch 6, cost  -20.6919521689
Pre-training layer 1, epoch 7, cost  -23.1866801232
Pre-training layer 1, epoch 8, cost  -31.208696872
Pre-training layer 1, epoch 9, cost  -29.2669503652
Pre-training layer 1, epoch 10, cost  -6.55169326067
Pre-training layer 1, epoch 11, cost  18.5047839797
Pre-training layer 1, epoch 12, cost  27.6585892439
Pre-training layer 1, epoch 13, cost  54.1556616127
Pre-training layer 1, epoch 14, cost  62.8680252433
Pre-training layer 1, epoch 15, cost  94.8633913994
Pre-training layer 1, epoch 16, cost  99.879888773
Pre-training layer 1, epoch 17, cost  105.523454845
Pre-training layer 1, epoch 18, cost  120.330746889
Pre-training layer 1, epoch 19, cost  127.346972466


could you please tell me why it's happening?

thank you so much.


 

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