knitr and plotting neural networks

Question

I\'m trying to plot some neural network outputs, but I\'m not getting any result. Plotting normal stuff like plot(iris) works fine, but there\'s something about

Answer 1

I think the issue is that for objects of class nn, plot uses a parameter rep. If rep is not defined, all repetitions are plotted in separate windows (when run outside of RMarkdown). If rep = "best", only the plot with the smallest error is generated. So this should work:

```{r}
library(neuralnet)
AND <- c(rep(0,3),1)
binary.data <- data.frame(expand.grid(c(0,1), c(0,1)), AND)
net <- neuralnet(AND~Var1+Var2,  binary.data, hidden=0,err.fct="ce", 
linear.output=FALSE)
plot(net, rep = "best")
```

See ?plot.nn.