Matplot1 - 2D plot of a matrix using colors

Calling Sequence

Matplot1(a,rect)

Parameters

• 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 specify 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.

Examples

//--- first example
set figure_style new;
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])

//--- second example  (animation)
n=100;

set figure_style new;
clf();
f=gcf();//get current figure handle
f.pixmap='on';//double buffer mode
ax=gca();//get current axes handle
ax.data_bounds=[0,0;10,10];//set the data_bounds
ax.box='on'; //draw a box 
show_pixmap()
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])
  show_pixmap() //send double buffer to screen
end

 
  

See Also

colormap ,   plot2d ,   Matplot ,   grayplot ,   Matplot_properties ,  

Author

J.Ph.C.