Displaced axis on figures

I am about to make an animation of changes on a map and I produce several figures to do so with same axis. However, the axis of my figures occationaly changes place slightly. I am using m_map tools to plot:

for i = 1:30
(imports new Data)

m_proj('Stereographic','lon',[-50],'lat',[70],'rad',10,'rectbox','on'); % 
m_pcolor(Longitude,Latitude,Data); % Plots the data on a map
m_grid; % Creates a grid on the map
colorbar
set(gca, 'CLim', [-50,165]); % Max and min on colorbar
axis image

end

Why are the figures changing the axis? Thank you in advance.

Answer 1

[Chad Greene]

I'm guessing your data bounds might be changing with each frame? I recommend doing as little as possible inside the loop. Instead of initializing a new projection for each frame, just initialize once. And instead of calling a colorbar multiple times, just call it once. The axis image command is probably where the limits are getting altered--so instead of letting axis image decide how to set the axis limits, set them explicitly. Like this:

% First frame: 
m_proj('Stereographic','lon',[-50],'lat',[70],'rad',10,'rectbox','on'); % 
h = m_pcolor(Longitude,Latitude,Data); % Plots the data on a map
m_grid; % Creates a grid on the map
cb = colorbar; 
ylabel(cb,'my colorbar'); 
caxis([-50,165]); % Max and min on colorbar
axis image
ax = axis; 

% All the other frames: 
for k = 2:30
  (imports new Data)

    set(h,'CData',Data) 

    caxis([-50,165]); 
    axis(ax)

end

I changed your i variable to k because i is built-in as the imaginary unit.