MAT PLOT CELLS

MAT PLOT CELLS fills a rectangular area with the colors assigned by a 2-dimensional array.

Let M be a 2-dimensional array.
`MAT PLOT CELLS, IN x1 , y1 ; x2 , y2 : M
` (x1 , y1) and (x2 , y2) are 2 diagonal vertices of the rectangular.
The point (x1 , y1) is the base point.

Example

    10 DIM A(2,3)
    20 DATA 1,2,3
    30 DATA 4,5,6
    40 MAT READ A
    50 SET WINDOW 0,4,0,4
    60 MAT PLOT CELLS,IN 0,0; 2,3 :A
    70 END

A rectangle whose diagonal vertices are (0,0) and (2,3) is divided into 2 vertically, and 3 horizontally, and each segments are painted with the color assigned with the array A.

Remark
An incorrect color index causes a non-fatal exception. That is, a MAT PLOT CELLS statement can raise an exception only when it is written in a WHEN-body, but regularly it does not stop the execution of the program.