How do you pass coordinates from getrect into a variable?

So I've probably misunderstood this function altogether.

When using GetRect I am trying to return the coordinate and drag distances to a variable. When I do this in my script I can't get it to store the values, only output them to screen.

Simple script I used:

       Selection = getrect;

Output I got:

       Selection =

            -9.6608   -4.0233    4.0111    3.3819

Everytime I seem to instantly lose the values. When I immediately try to access them after they don't exist.

Answer 1

[Image Analyst]

Step through your code a line at a time and figure out when Selection vanishes. You're possibly either doing a clear(), or losing scope. If it's the latter, see the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

[Dustin Gutsche]

Stepping through shows the variable is never actually created. The very next line I start using the four elements to return the window to my main function. For now I am just directly calling it so I don't know why it's disappearing from memory.

The function getrect is supposed to return a 1x4 vector which I have named Selection then want to use the values from.

Here's my code:

%%Choose the Region

      Selection = getrect; % Select the Area of Interest Using a Mouse

%%Results

     X_Cut_Min = Selection(1,1);
     Y_Cut_Min = Selection(1,2);
     X_Cut_Max = Selection(1,3) + Selection(1,1);
     Y_Cut_Max = Selection(1,4) + Selection(1,2);

[Image Analyst]

Hard to replicate since I don't have your full code. If you want, you can use rbbox() or imrect() instead - they're essentially the same thing. But rbbox() "finishes" as soon as you lift the mouse button while imrect() lets you adjust the sides before "finishing".

Answer 2

[Dustin Gutsche]

I feel like I have discovered something. If I separate the 'getrect' part into a separate function it works. I guess this means something about how I am manipulating the figure is incorrect....