Converts a raw .png file to a grob, with flexible aesthetics.
convert_to_image_grob(.image, aes_list, height = numeric(), width = numeric())
A grob of the raw .png file.
The local path to the raw .png file.
The list outputted by ga_list
which gives the image grob its aesthetics.
A numeric value designating the total height of the matrix grob in mm.
A numeric value designating the total width of the matrix grob in mm.