[R] how to plot 2d matrix as coloured squares?

i have a matrix like x1 x2 x3 y1 2 34 5656 y2 34 434 342 y3 234 43 34 i want to plot these values like here http://www.almob.org/content/2/1/12/figure/F5?highres=y The rainbow function could calculate a colour for each value. But how van i generate the square pattern? Kind

Re: [R] how to plot 2d matrix as coloured squares?

On 04/08/2012 02:11 AM, Jonas Stein wrote: i have a matrix like x1 x2 x3 y1 2 34 5656 y2 34 434 342 y3 234 43 34 i want to plot these values like here http://www.almob.org/content/2/1/12/figure/F5?highres=y The rainbow function could calculate a colour for each value. But how