Avoid turning plot when on a figure

Hello!

I need to plot x and y coordinates over a figure representing a map, which will be displayed at a viewport on the rightop of the figure.

However, when I use the code below, it works, but y coordinates of the points are flipped. Using only the first three lines of the code places the figure properly; using the code without the image function places the points in the correct position. When I run the whole code, y-axis flips and y-coordinates are plotted flipped. I tried set(gca,'Ydir','reverse'), but it did not work.

Any help?

Thanks.

   ha2=axes('position',[0.75, 0.55, .22,.42,]); % position of the viewport
   image(mapabase,'XData',[-49.7 -48.7],'YData',[1.12 1.67])  %image workin as a map
   hold on
   for k=1:1:qtde_psgns 
   plot(navios_cel{k}(:,4),navios_cel{k}(:,3),'.','markers',5);   %coordinates of several surveys
   end
   grid on
   hold off
   xlim ([-49.7 -48.7])   
   ylim ([1.12 1.67])

Answer 1

[Adam Danz]

"I tried set(gca,'Ydir','reverse'), but it did not work."

That's because for image() plots the ydir is already set to 'reverse'. You want to set it to 'normal'.

ha2.YDir = 'normal'
% or 
set(ha2, 'YDir', 'normal')

[Diego Fonseca]

Thanks for your answer. However, when I apply ha2.YDir = 'normal', the points x and y are plotted properly, but the image flips. Is there anyway of having both (figure and points) plotted in the proper direction as I want them to represent a map?

[Adam Danz]

Yes! :)

You can follow this demo.

The key is to use flipud() to flip the data prior to executing imagesc().

[Diego Fonseca]

Thanks a lot. It worked perfectly!!!

Nice! ;)

[Adam Danz]

High five!