MATLAB: How to plot many plots at the same one

Question

Hello,

I'm tying to show the result (five plots for detected patterns) of the code below in one plot but in vain,

any idea please

help is much appreciated

n = 50 ;

 A = double( rand(n, n+1) > 0.5 ) ;
 B = 2*A - 1 ;
 patterns = {[1 0 1; 0 1 0; 1 0 1]; ... % X
             [1 0 1; 0 1 0; 1 0 0]; ... % Y
             [0 1 0; 1 0 1; 0 1 0]; ... % O
             [0 0 0; 1 1 1; 0 0 0]; ... % -
             [1 0 0; 1 0 0; 1 1 1]} ;   % L
 labels   = {'X', 'Y', 'O', '-', 'L'} ;
 matches  = cell( size(labels )) ;
 for pId = 1 : numel( patterns )
     nel    = numel( patterns{pId} ) ;
     ker    = 2*patterns{pId} - 1 ;    
     [r, c] = find( conv2(B, rot90(rot90(ker)), 'same') == nel ) ;
     matches{pId} = [r, c] ;
     figure(pId) ;  clf ;  hold on ;
     spy(A) ;
     plot( c, r, 'r+', 'MarkerSize', 20 ) ;
     title( sprintf( 'Matches for "%s" pattern', labels{pId} )) ;
     set( gcf, 'Units', 'normalized' ) ;
     set( gcf, 'Position', [0 0 0.4 0.7] ) ;
 end

Answer 1

Try using subplot() and getting rid of the set()s:

n = 50;
A = double( rand(n, n+1) > 0.5 ) ;
B = 2*A - 1 ;
patterns = {[1 0 1; 0 1 0; 1 0 1]; ... % X
  [1 0 1; 0 1 0; 1 0 0]; ... % Y
  [0 1 0; 1 0 1; 0 1 0]; ... % O
  [0 0 0; 1 1 1; 0 0 0]; ... % -
  [1 0 0; 1 0 0; 1 1 1]} ;   % L
labels   = {'X', 'Y', 'O', '-', 'L'} ;
matches  = cell( size(labels )) ;
for pId = 1 : numel( patterns )
  subplot(2,3,pId); % Put plot into this location.
  nel    = numel( patterns{pId} ) ;
  ker    = 2*patterns{pId} - 1 ;
  [r, c] = find( conv2(B, rot90(rot90(ker)), 'same') == nel ) ;
  matches{pId} = [r, c] ;
%   figure(pId) ;  clf ;  
  hold on ;
  spy(A) ;
  plot( c, r, 'r+', 'MarkerSize', 20 ) ;
  title( sprintf( 'Matches for "%s" pattern', labels{pId} )) ;
%   set( gca, 'Units', 'normalized' ) ;
%   set( gca, 'Position', [0 0 0.4 0.7] ) ;
end
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);