I think you would do better by using more subplots: subplot(2,2,1) etc.
If you just want two images next to each other, and if they're the same size, you can concatenate them and display them both at once: imshow([image1 , or ; image2]), (choose between , and ; for how you want them displayed.), but if there is a mean level change between the images, they won't look quite right.
You could also have more subplots, and use "get" & "set" to position them as desired.
