data cursor function for 3D slice

I need to make the data cursor on a 3D slice display value of the function being displayed; i.e. for slice(X,Y,Z,f,0,[],[]) make data cursor display value of f. Can you suggest a code to do that?

more example:

[X Y Z]=meshgrid([-2:.1:2],[-2:.1:2],[-2:.1:2]);
f=rand(41,41,41);
slice(X,Y,Z,f,0,[],[])

Answer 1

[Sean de Wolski]

Use datacursormode and set a your own updatefcn to display the value.

doc datacursormode

Provide us with a small example for more specific assistance.

More per example

function dcmmode_example

[X Y Z]=meshgrid([-2:.1:2],[-2:.1:2],[-2:.1:2]); 
f=rand(41,41,41);
slice(X,Y,Z,f,0,[],[]) 

dcm_obj = datacursormode(gcf); %datacursor mode on
set(dcm_obj,'enable','on','updatefcn',{@updateMe X Y Z f}) %update, need X,Y,Z, f-values

function msg = updateMe(src,evt,X,Y,Z,f)

evt = get(evt); %what's happenin'?
pos = evt.Position; %position
fval = f(X==pos(1)&Y==pos(2)&Z==pos(3)); %where?
msg = num2str(fval); %create msg

Answer 2

[A]

that worked... thanks

Total longshot, but is there a way to draw a line across the slice and plot the line profile? (i.e. have it open a new figure and plot values of f across that line)

[Sean de Wolski]

I don't see why not.

[A]

how?

[Sean de Wolski]

Get the information (somehow similar to what I did) and then call another function that draws lines.

[A]

let me rephrase the question... I need the user to be able to draw an arbitrary line on the slice figure and have matlab plot magnitude of f along that line.

[Jan]

The question is not clear.