MATLAB: How to create an animated plot

3d plotanimated plotplotsurf

I'm trying to combine 24 plots (each plot representing the density of people in a certain area) into one figure (making some what of an animated plot). But instead of my 24 plots being displayed one after the other in the same figure with a short pause in between each one, I end up with 24 separate figures. How do I combine them and make an animated plot? This is the code I have at the moment. Trying to combine them so I can see how density changes after every hour.
for k = 1:24  
for i = 1:30
  for j = 1:30
      hrVal = zeros(1,1); 
      if ~isempty(gridPax{i,j})
          hrVal = log(gridPax{i,j}(k)+1);  
        end
        hrPax{i,j} = hrVal;
    end
 end
x = linspace(103.6,104,30);
y = linspace(1.5,1.25,30);
 [X,Y] = meshgrid(x,y); 
 Z = cell2mat(hrPax); 
 % interpolate to a finer grid 
 newG = 200;
 xq = linspace(103.6,104,newG);
 xy = linspace(1.5,1.25,newG); 
 [Xq,Yq] = meshgrid(xq,xy);
 Zq = interp2(X,Y,Z,Xq,Yq,'cubic');
 figure('Name', 'Pax per Hour');
 hold on;
 surf(Xq,Yq,Zq);
 xlabel 'Latitude'; ylabel 'Longitude'; zlabel 'No. of Pax';
 axis tight
 colormap default
 end

Best Answer

You place figure and hold on line outside the loop:
figure('Name', 'Pax per Hour');
hold on;
for k = 1:24
    for i = 1:30
        for j = 1:30
            hrVal = zeros(1,1);
            if ~isempty(gridPax{i,j})
                hrVal = log(gridPax{i,j}(k)+1);
            end
            hrPax{i,j} = hrVal;
        end
    end
    x = linspace(103.6,104,30);
    y = linspace(1.5,1.25,30);
    [X,Y] = meshgrid(x,y);
    Z = cell2mat(hrPax);
    % interpolate to a finer grid
    newG = 200;
    xq = linspace(103.6,104,newG);
    xy = linspace(1.5,1.25,newG);
    [Xq,Yq] = meshgrid(xq,xy);
    Zq = interp2(X,Y,Z,Xq,Yq,'cubic');
      surf(Xq,Yq,Zq);
      xlabel 'Latitude'; ylabel 'Longitude'; zlabel 'No. of Pax';
      axis tight
      colormap default
      drawnow
  end
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