How do I convert a list of grayscale images into RGB images using EBImage

Question

I have a list of grayscale images. They are stored in R via EBimage with the following code:

Normaltrain<-list.files(path="folderl",pattern='jpeg',all.files=T,full.names=T)

Normaltrainpics<-list()
for (i in 1:169) {Normaltrainpics[[i]]<-readImage(Normaltrain[i])}

They are stored as images with the following attributes:

Image
  colormode: Grayscale 
  storage.mode: double 
  dim: X Y 
  nb.total.frames: 1 
  nb.render.frames: 1

How do I convert all of these images into rgb, or at least give them the dimensions [x,y,3]? I have done a for loop with channel(Normaltrainingpics[[i]],'rgb') but dimensions remain the same. Thanks.

https://rdrr.io/bioc/EBImage/man/channel.html According to this resource: "rgb" converts a Grayscale image or an array into a Color image, replicating RGB channels.

Answer 1

for (i in 1:150) {toRGB(Normaltrainingpics[[i]])} seems to have done the trick.