Option to use SELU for the activation layer in mlp via keras

[obgeneralao]

Is it possible to add "selu" activation function for Multilayer perceptron via keras?
How to use "Adamax" optimizer instead of the default "Adam"?

I am using keras==2.15 and tensorflow==2.15 and parsnip==1.2.1.

Thanks a lot.

[EmilHvitfeldt]

You can set the optimizer as a engine argument via set_engine().

library(tidymodels)

model <- 
  mlp() %>%
  set_engine("keras", optimizer = "Adamax") %>%
  set_mode("classification")

model_fit <- fit(model, class ~ ., sim_classification(1000))
model_fit$fit$optimizer
#> <keras.src.optimizers.legacy.adamax.Adamax object at 0x342a737d0>

^{Created on 2025-01-29 with reprex v2.1.1}

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