torch (version 0.8.1)

optim_rprop: Implements the resilient backpropagation algorithm.

Description

Proposed first in RPROP - A Fast Adaptive Learning Algorithm

Usage

optim_rprop(params, lr = 0.01, etas = c(0.5, 1.2), step_sizes = c(1e-06, 50))

Arguments

params

(iterable): iterable of parameters to optimize or lists defining parameter groups

lr

(float, optional): learning rate (default: 1e-2)

etas

(Tuple(float, float), optional): pair of (etaminus, etaplis), that are multiplicative increase and decrease factors (default: (0.5, 1.2))

step_sizes

(vector(float, float), optional): a pair of minimal and maximal allowed step sizes (default: (1e-6, 50))

Warning

If you need to move a model to GPU via $cuda(), please do so before constructing optimizers for it. Parameters of a model after $cuda() will be different objects from those before the call. In general, you should make sure that the objects pointed to by model parameters subject to optimization remain the same over the whole lifecycle of optimizer creation and usage.

Examples

if (torch_is_installed()) {
if (FALSE) {
optimizer <- optim_rprop(model$parameters(), lr = 0.1)
optimizer$zero_grad()
loss_fn(model(input), target)$backward()
optimizer$step()
}
}