Comments (1)
Hi, bumping this because I have the same issue.
Reproduce by running the "DeepSurv Example" notebook and then saving the model using
model.save_model('bestparams.json', weights_file='bestweights.h5')
Then, run the following cell repeatedly. You will get a new c-index each time. I've gotten anywhere between 0.25 and 0.65 for the c-index by doing this.
model2 = deepsurv.deep_surv.load_model_from_json('bestparams.json', weights_fp='bestweights.h5')
if model2.standardize:
model2.offset = train_data['x'].mean(axis = 0)
model2.scale = train_data['x'].std(axis = 0)
x_train2, e_train2, t_train2 = model2.prepare_data(train_data)
compute_hazards = theano.function(inputs = [model2.X],outputs = -model2.partial_hazard)
partial_hazards2 = compute_hazards(x_train2)
ci_train = concordance_index(t_train2,partial_hazards2,e_train2) #from lifelines
print(ci_train)
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