MAKEDATATIP

Allows programmatically adding datatips to any valid graphical object.

Description

MAKEDATATIP allows programmatically adding datatips to graphical objects.

Creation of this function was motivated because I was unable to find any simple built-in method. If there is a better method, I would love to know about it.

Note that this function was only tested in R2007b.

Example:
  x = 1:10;
  y = rand(1,10);
  hPlot = plot(x,y);
  makedatatip(hPlot,[3 8])

Example:
  [X,Y,Z] = peaks(30);
  hObj = surf(X,Y,Z);
  I = [5 8; 20 12; 22 28];
  hDatatip = makedatatip(hObj, I);

• Acknowledgements: This submission has inspired the following:; linkdatatips
• MATLAB release: MATLAB 7.5 (R2007b)

[John D'Errico]

A nice idea. Good help, lots of examples, good error checking, an H1 line. Well done.

[Ben Kang]

Very useful! Sometimes, it's hard to find and select exactly the point, especially for 3-D complex surface.

[Daphne W]

Just what I was looking for on the Newsgroup a few months ago. Works perfectly on 2006b as well.
Thanks!

[Yannick T]

Very useful indeed. I don't know why Matlab itself doesn't provide this feature, I spent a lot of time searching the documentation for a way to do this.

[Jason]

Is there an easy way to allow makedatatip work with scatter plots?

??? Error using ==> makedatatip at 57
Objects of class 'specgraph.scattergroup' are not a valid targets for
datatips.

Thanks.

[James Ross]

Any chance of posting this using the BSD License?

[Alexandre Schimel]

very good, well coded and useful function.
Just a note. I use R2008a and tried to use it on a "imagesc" graphical object. The function doesn't work since image properties have different XData and YData and no Zdata. I had to tweak a little the code.

[Ben]

 

[Benjamin]

 

[Maider Marin]

I have an image and I need to put datatips on pixels in positions [61,98] and [63,94] then I try to use this function calling my image J:
hObj=imshow(J);makedatatip(hObj,[61,98; 63,94])
but I got an error:
??? Error using ==> get
There is no 'ZData' property in the 'image' class.

Then I commented line 65 and write
Z=[]; the truth is I am only going to used for images. But then I have a second error.
??? Attempted to access X(61); index out of bounds because numel(X)=2.

Error in ==> makedatatip at 99
    pos = [X(index(n)) Y(index(n))];
Can somebody help me.