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See the recommended documentation of this function

Scilab help >> Graphics > 2d_plot > Matplot1

# Matplot1

2D plot of a matrix using colors

### Calling Sequence

`Matplot1(a, rect)`

### Arguments

a

a real matrix of size `(n1,n2)`.

rect

`[xmin, ymin, xmax, ymax]`.

### Description

The entries of matrix `int(a)` are used as colormap entries in the current colormap. `rect` specifies a rectangle in the current scale and the matrix is drawn inside this rectangle. Each matrix entry will be rendered as a small rectangle filled with its associated color. If a matrix entry is outside the colormap, the corresponding rectangle is not displayed.

Enter the command `Matplot1()` to see a demo.

### Examples

```clf();
ax = gca();//get current axes handle
ax.data_bounds = [0, 0; 10, 10]; //set the data_bounds
ax.box = 'on'; //draw a box
a = 5*ones(11,11);
a(2:10, 2:10) = 4;
a(5:7, 5:7) = 2;
// first matrix in rectangle [1,1,3,3]
Matplot1(a, [1,1,3,3])
a = ones(10,10);
a = 3*tril(a)+ 2*a;
// second matrix in rectangle [5,6,7,8]
Matplot1(a,[5,6,7,8])```
```//--- (animation)
n=100;

clf();
f=gcf();//get current figure handle
f.pixmap='on';//double buffer modea
ax=gca();//get current axes handle
ax.data_bounds=[0,0;10,10];//set the data_bounds
ax.box='on'; //draw a box
for k=-n:n,
a=ones(n,n);
a= 3*tril(a,k)+ 2*a;
a= a + a';
k1= 3*(k+100)/200;
if k>-n then delete(gce()),end
Matplot1(a,[k1,2,k1+7,9])
sleep(20); // Slow down the simulation
end
f.pixmap='off';```