lib/torch/optim/rprop.rb in torch-rb-0.4.2 vs lib/torch/optim/rprop.rb in torch-rb-0.5.0

@@ -50,10 +50,10 @@
             # for dir>=0 dfdx=dfdx
             grad = grad.clone
             grad[sign.eq(etaminus)] = 0
 
             # update parameters
-            p.data.addcmul!(-1, grad.sign, step_size)
+            p.data.addcmul!(grad.sign, step_size, value: -1)
 
             state[:prev].copy!(grad)
           end
         end