Comments on: A Link to the Data http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/ Ken & Mike work on the MATLAB Desktop team Sun, 08 Nov 2009 05:41:16 +0000 http://wordpress.org/?v=2.3.1 By: Mike http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-6276 Mike Tue, 02 Jun 2009 11:57:56 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-6276 Huijing, This is the correct behavior since: <ul> <li>the x and y variables are two columns of the same variable</li> <li>brushing linked variables always applies to entire rows</li></ul> We think you can do what you want by creating two different variables, one for each column and then only linking one of them as follows: <pre class="code"> x = rand(10,1); y = randn(10,1); plot(x,y); linkdata </pre> <ol> <li>Click on the Edit... link of the linked plot bar to ensure that only one of the variables (say x) is linked</li> <li>Brush the points of interest and replace them with NaN</li> <li>NaNs should only be added to the linked variable (x)</li> </ol> So, to reiterate, the x & y values should be in separate variables. Huijing,

This is the correct behavior since:

  • the x and y variables are two columns of the same variable
  • brushing linked variables always applies to entire rows

We think you can do what you want by creating two different variables, one for each column and then only linking one of them as follows:

x = rand(10,1);
y = randn(10,1);
plot(x,y);
linkdata
  1. Click on the Edit… link of the linked plot bar to ensure that only one of the variables (say x) is linked
  2. Brush the points of interest and replace them with NaN
  3. NaNs should only be added to the linked variable (x)

So, to reiterate, the x & y values should be in separate variables.

]]> By: huijing http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-6252 huijing Wed, 20 May 2009 16:02:50 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-6252 Hello Mike, I used brush and link to set some data points to NaN, my original data is a 480*2 matrix, and I took its first column as x, second column as y to plot. like, plot(ROT_cap(:,1),ROT_cap(:,2),'o') since I just want to set the second column of selected points to NaN, I only set link with second column, but it turned out the two columns were changed. Is this just the way it should be? Thanks! Hello Mike,
I used brush and link to set some data points to NaN, my original data is a 480*2 matrix, and I took its first column as x, second column as y to plot. like, plot(ROT_cap(:,1),ROT_cap(:,2),’o')

since I just want to set the second column of selected points to NaN, I only set link with second column, but it turned out the two columns were changed.

Is this just the way it should be? Thanks!

]]> By: Mike http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-6024 Mike Mon, 15 Dec 2008 14:30:56 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-6024 Param, You can access the brushed data through the "BrushData" instance property of the graphic objects being brushed. For example: <pre> plot(randn(100,1)); % Brush some data, then get the line on the plot l = get(gca,'children'); % Get the BrushData instance prop for the line get(l,'BrushData') </pre> Note that the "BrushData" property is *not* documented. That means that the name or data type may change in a future release so don't depend on it. Param,

You can access the brushed data through the “BrushData” instance property of the graphic objects being brushed. For example:

plot(randn(100,1));
% Brush some data, then get the line on the plot
l = get(gca,'children');
% Get the BrushData instance prop for the line
get(l,'BrushData')

Note that the “BrushData” property is *not* documented. That means that the name or data type may change in a future release so don’t depend on it.

]]> By: Param http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-6017 Param Wed, 10 Dec 2008 10:43:22 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-6017 How do i retrive brushed data? For e.g. I have a plot and use the brush tool to select some points on the plot how do i get access to data selected? Thanks in advance How do i retrive brushed data?
For e.g. I have a plot and use the brush tool to select some points on the plot how do i get access to data selected?
Thanks in advance

]]> By: Mike http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-5994 Mike Wed, 19 Nov 2008 15:03:16 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-5994 @erkut, I am not sure what you are asking for. I think this may be it... a sample output from my timer example? <img src="http://blogs.mathworks.com/images/desktop//michael_katz_linked_plots/att_animated.gif" width="500" height="436"/> @erkut,

I am not sure what you are asking for. I think this may be it… a sample output from my timer example?

]]> By: erkut http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-5992 erkut Wed, 19 Nov 2008 13:42:11 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-5992 Timer and Dynamic Images Give snapshots of the working program showing its proper work for testing examples - 5-6 snapshots Timer and Dynamic Images
Give snapshots of the working program showing its proper work for testing examples - 5-6 snapshots

]]> By: James Owen http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-4629 James Owen Mon, 19 May 2008 12:39:28 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-4629 For Chee’s example, I’m not sure exactly why “x_remain” has not changed, but I would recommend removing the call to “linkdata on” from the deleteData function. It creates a dynamic link between the graphics and the variables “x”,”y” in the current workspace. When execution passes from the deleteData functional workspace back to the base workspace, those variables may no longer exist or may have changed, potentially causing the plot to update to reflect the changes. For Greg’s point about linkdata for images, we agree that this would be good to do, and it definitely adds weight to the idea to hear customers ask for it specifically. For Chee’s example, I’m not sure exactly why “x_remain” has not changed, but I would recommend removing the call to “linkdata on” from the deleteData function. It creates a dynamic link between the graphics and the variables “x”,”y” in the current workspace. When execution passes from the deleteData functional workspace back to the base workspace, those variables may no longer exist or may have changed, potentially causing the plot to update to reflect the changes.

For Greg’s point about linkdata for images, we agree that this would be good to do, and it definitely adds weight to the idea to hear customers ask for it specifically.

]]> By: Greg Johnson http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-4586 Greg Johnson Fri, 16 May 2008 13:47:28 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-4586 It doesn't seem possible to do linkdata for images - which is a great shame! Is this in the pipeline? It doesn’t seem possible to do linkdata for images - which is a great shame! Is this in the pipeline?

]]> By: Mike http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-4345 Mike Wed, 30 Apr 2008 15:19:50 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-4345 Chee, I am not able to help you further debug in this way. If you have maintenance on your license, you can contact tech support and perhaps someone there can walk through it with you. http://www.mathworks.com/support/service_requests/contact_support.do Chee,

I am not able to help you further debug in this way. If you have maintenance on your license, you can contact tech support and perhaps someone there can walk through it with you. http://www.mathworks.com/support/service_requests/contact_support.do

]]> By: chee http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-4323 chee Mon, 28 Apr 2008 21:50:43 +0000 http://blogs.mathworks.com/desktop/2008/04/14/a-link-to-the-data/#comment-4323 Hi Mike, I run the same code. x_remain is the same as origX although y_remain is different from origY. Not sure what is wrong... Thanks. Sincerely, Chee Hi Mike,

I run the same code. x_remain is the same as origX although y_remain is different from origY.

Not sure what is wrong…

Thanks.

Sincerely,
Chee

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