change position of many legend

hi !!

i have a probleme to plot legend inside a condition

the last condition reset or be superpositoin on the last one

my code is.....

hold on
   if(exist ('blockx') == false)
      %disp('blockx is not initialized');
   else
     blockx = blockx(~all(blockx == 0, 2),:); 
     cdlx=plot3(blockx(:,2),blockx(:,3),blockx(:,4),'mo','MarkerSize',sz,...    
              'MarkerEdgeColor','m',...
              'MarkerFaceColor','m');  
      legend(cdlx,'Block_X','Location','northeast');
     
   end
   hold on
   
   if(exist ('blocky') == false)
     %disp('blocky is not initialized');
   else
     blocky = blocky(~all(blocky == 0, 2),:); 
     cdly=plot3(blocky(:,2),blocky(:,3),blocky(:,4),'bo','MarkerSize',sz,...    
              'MarkerEdgeColor','b',...
              'MarkerFaceColor','b');
     legend(cdly,'Block_Y','Location','northeast');
     
   end
   hold on
   

    if(exist ('blockz') == false)
     %disp('blockz is not initialized');
   else
     blockz = blockz(~all(blockz == 0, 2),:); 
     cdlz=plot3(blockz(:,2),blockz(:,3),blockz(:,4),'go','MarkerSize',sz,...    
              'MarkerEdgeColor','g',...
              'MarkerFaceColor','g');
     legend(cdlz,'Block_Z','Location','northeast');
       
   end
   hold on
   
%    if ~exist(cdlz)
%   
%    end
   
   
   if(exist ('encast') == false)
      %disp('encast is not initialized');
   else
    encast = encast(~all(encast == 0, 2),:);

    cdlxyz=plot3(encast(:,2),encast(:,3),encast(:,4),'rs','MarkerSize',sz,...    
              'MarkerEdgeColor','r',...
              'MarkerFaceColor','r');     
    legend(cdlxyz,'encastrement','Location','northeast');
      
   end
   
   hold on
   
   if(exist ('blockxz') == false)
      %disp('blockxz is not initialized');
   else
     blockxz = blockxz(~all(blockxz == 0, 2),:); 
     cdlxz=plot3(blockxz(:,2),blockxz(:,3),blockxz(:,4),'yo','MarkerSize',sz,...    
              'MarkerEdgeColor','y',...
              'MarkerFaceColor','y'); 
     legend(cdlxz,'Block_XZ','Location','northeast');
     
   end
   hold on
   if(exist ('blockxy') == false)
    % disp('blockxy is not initialized');
   else
     blockxy = blockxy(~all(blockxy == 0, 2),:); 
     cdlxy=plot3(blockxy(:,2),blockxy(:,3),blockxy(:,4),'co','MarkerSize',sz,...    
              'MarkerEdgeColor','c',...
              'MarkerFaceColor','c'); 
     legend(cdlxy,'Block_XY','Location','northeast');
      
   end
   hold on
   
   
    if(exist ('blockyz') == false)
     %disp('blockyz is not initialized');
   else
     blockyz = blockyz(~all(blockyz == 0, 2),:); 
     cdlyz=plot3(blockyz(:,2),blockyz(:,3),blockyz(:,4),'ko','MarkerSize',sz,...    
              'MarkerEdgeColor','k',...
              'MarkerFaceColor','k'); 
     legend(cdlyz,'Block_YZ','Location','northeast');
     
    end
   hold on

need some help

and thanks

Answer 1

[Walter Roberson]

Instead of using a number of individual plot() followed by individual legend() calls, set the plot DisplayName property to the string you want displayed, and legend show once afterwards.

     cdlyz=plot3(blockyz(:,2),blockyz(:,3),blockyz(:,4),'ko','MarkerSize',sz,...    
              'MarkerEdgeColor','k',...
              'MarkerFaceColor','k', 'DisplayName', 'Block_YZ');
     %and do not legend() right afterwards, not until all of the plots are done

[alize beemiel]

thanks