[R] image usage

[Julianno Sambatti]

I am beginner in R and am trying to use the image function to create a 
grid, but would like to use an outer file as input. A file that 
contains the following array for example:

3	4	5
2	3	5
1	2	1

so that each cell has a color with different intensity. I am having 
problems to input the file and am not sure that image would do it  . 
Does anybody know how to do it or have another suggestion?

Thanks

Julianno