---
title: "Migrating from Ignite"
output:
  rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Migrating from Ignite}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE,eval = FALSE,echo = T)
```


<center>

<img src="images/ignite.jpg" alt="_" style="width: 600px;"/>

</center>


## Intro

Ignite is a high-level library to help with training and evaluating neural networks in PyTorch flexibly and transparently.

## Ignite with fastai

```{r}
library(fastai)
library(magrittr)

data = Data_Loaders(get_data_loaders(64, 128))$cuda()

nn = nn()
opt_func = partial(SGD, momentum=0.5)
learn = Learner(data, Net(), loss_func = nn$NLLLoss(), opt_func = opt_func, metrics = accuracy)
learn %>% fit_one_cycle(1, 0.01)
```

```
epoch     train_loss  valid_loss  accuracy  time    
0         1.084753    0.908347    0.826600  00:13  
```