Linkdata + Brush Not Responding

I want to delete data points from a plot using brush and remove. I want these points to be deleted from my workspace variables. I can't get it to work when I have any pause or waitfor commands afterwards. It works fine when nothing follows. This is part of my code:

>fig=plot(X,Y);

brush on

linkdata on

waitfor(fig)

fig2=plot(X,Y)

Answer 1

[Walter Roberson]

What is your intention by using waitfor() ? waitfor() waits for the given object to be deleted.

If your intention is to give an opportunity for the user to do the brushing, then you would usually just return from the function at that point, having already established some control (e.g., 'Done' pushbutton) for the user to signal readiness to continue on.

[Adam]

Yes. I just want to give the user an opportunity to do brushing.

[Adam]

Is there anyway to do this without creating several functions? I just want 1 m file

[Walter Roberson]

Recursion and a state-machine. But I do NOT recommend that approach, not for this purpose.

Just put your several functions into your one .m file.

[Adam]

I've never done this multiple function technique. I'm a new programmer. I'm thinking something like this, but it's only making matters worse:

function [X,Y,Area,SR]=UPDAreaFinder()

%lines of code

figP=plot(X,Y);

linkdata on

brush on

figP=uicontrol('String','Done', 'Callback', {@part2function}');

function Areatotal=part2function(X,Y,Area,SR)

%lines of code

[Walter Roberson]

Possibly

function UPDAreaFinder(X, Y, Area, SR)

%lines of code

plot(X,Y);

linkdata on

brush on

uicontrol('String','Done', 'Callback', {@part2function, X, Y, Area, SR}');

function part2function(src, evt, X, Y, Area, SR)

%lines of code

Notice I did not return the Areatotal -- you cannot return values from these kinds of callbacks.

See though

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.3F

[Adam]

It's almost there. Thanks. The only problem is X,Y are not being passed in the updated form from the brushing and deleting.

[Adam]

It all works now. Thanks. I used assignin in the first function for X and Y and evalin in the second function for X and Y.

I don't understand why it's not sending the right X and Y with the callback.