MATLAB: Does the GINPUT function within MATLAB 7.0 (R14) return a wrong answer for the BUTTON output argument

buttonfigureginputMATLABpatchr14selectiontypewrong

To reproduce this behavior, execute the following function.

function mytest
line
flag = true;
while flag
    [zx, zy, button] = ginput(1);
    button
    if (button==3) %right button is clicked -> stop
        flag = false;
    end
end
close

First, click the left mouse button.

You will see that a "1" is correctly returned indicating a left button click.

Then, click the right mouse button. You will see that a "3" is correctly returned indicating a right button click, and the code will close the figure.

Then, execute the function again, and click the left mouse button. You will see that a "2" is incorrectly returned.

Best Answer

This bug has been fixed for Release 14 SP1 (R14SP1). For previous releases, please read below for any possible workarounds:

This issue has been verified as a bug in MATLAB 7.0 (R14) in the way the "SelectionType" property of a figure is set after a mouse button click. This only occurs when a button is clicked on a figure, that figure is closed, then another figure has been opened.

Currently, to workaround this issue, download and install one of the following platform-specific patches:

For Windows:

hg_patch_06292004_win32.zip

For Linux:

hg_patch_06292004_glnx86.zip

For Solaris:

hg_patch_06292004_sol2.zip

Links to these patches can be found the Resolution Documents section at the bottom of this page

Instructions for installing the patch:

1) Download and save the ZIP-file for the appropriate platform.

2) Within the directory "<matlabroot>/bin/<platform>", where [matlabroot] is the directory returned from the MATLABROOT command, and [platform] is the directory for the appropriate platform, rename the libuij.dll/libuij.so and libuij.csf files to libuij.dll/libuij.so.old and libuij.csf.old, respectively.

3) Within the directory "<matlabroot>/java/jar", rename hg.jar to hg.jar.old.

4) Close any existing instance of MATLAB. Open the ZIP-file patch and extract the files to the MATLAB root directory.

Note that if you do not rename the above specified files, they will be overwritten by the patch.

Related Solutions

MATLAB: Do I receive an error ” The conversion from UNKNOWN to NCHAR is unsupported” when working with DATAINSERT or FASTINSERT in Database Toolbox 3.10 (R2012a)

Support for inserting characters t ypes has been incorporated in Release 2012b (R2012b). For previous product releases, read below for any possible workarounds:

There is a limitation in Database Toolbox 3.10 (R2012a) in the way that it does not support nchars containing only one character.

To work around this limitation please install the attached patch:

1. Log in to an account with appropriate permissions to overwrite files in your MATLAB installation. On Linux systems, this is typically the root account.

2. Locate your MATLAB installation by typing matlabroot at the MATLAB command prompt. This folder is referred to as <MATLAB> in subsequent steps.

3. Exit MATLAB.

4. Download the attached .zip file associated with this Bug Report and store the file in the <MATLAB> folder.

5. Make a backup copy of each of the files listed in the .zip file. To see the contents of the .zip file open the .zip file in Winzip or Linux equivalent and look at the contents.

6. Extract the files from the .zip file.

a. Open the .zip file.

b. Extract the contents of the file to your <MATLAB> folder.

7. Delete the .zip file in the <MATLAB> folder.

MATLAB: How to deploy a Simulink model over the web using MATLAB Compiler 4.5 (R2006b)

In order to deploy a Simulink model over the web using MATLAB Compiler, you will need to have Real-Time Workshop installed. In addition, if you wish to create an HTML-file that displays your Simulink model, you will need to have Simulink Report Generator installed as well.

This solution assumes that you have set up a cgi-bin directory on your web server that allows for client permissions to run scripts and executables. For guidance on this setup, we recommend that you consult with your system administrator.

Here are the steps you will need to follow to deploy a Simulink model over the web:

1. Download the attached ZIP-file to your working directory and extract its contents.

2. Start MATLAB.

3. Open the Simulink model test.mdl and hit Ctrl-B to build the standalone test.exe.

4. Select File->Export to Web option from the menubar and click OK. If you are prompted to download the SVG viewer plug-in, then click on the link and follow the instructions from Adobe's website. Once you have successfully installed the plug-in, close your web browser and simulink model.

5. At the MATLAB command prompt, issue

x=5;
p = rsimgetrtp('test','AddTunableParamInfo','on');
save paramfile p;

These commands will generate the MAT-file that is required by test.exe.

6. At the MATLAB command prompt, issue:

mcc -m simweb

This command will compile the MATLAB file simweb.m into a standalone executable simweb.exe. The simweb.exe file will be responsible for generating the HTML content that displays the Simulink output in the form of a MATLAB figure.

7. At the MATLAB command prompt, issue

!simweb

in order to test this executable and pre-extract the CTF-archive file.

8. Open test_slwebview.html in a text editor and modify its content such that it reads:

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <html><head><title>Simulink Web View</title></head><body leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
 <embed height="100%" width="100%" src="./test_slwebview_files/test_slwebview.svg" type="image/svg+xml" pluginspage="<http://www.adobe.com/svg/viewer/install/ http://www.adobe.com/svg/viewer/install/">>
   <noembed>
     <p><b>SVG Renderer Required</b>: Your browser does not support Scalable Vector Graphics.  Install the free <a href="<http://www.adobe.com/svg/viewer/install/ http://www.adobe.com/svg/viewer/install/">>Adobe SVG Viewer</a> plugin or a <a href="<http://www.mozilla.org/products/firefox/all http://www.mozilla.org/products/firefox/all">>SVG-compatible web browser</a> to view this Simulink model.</p>
   </noembed>
 </embed>
 <FORM ACTION="/cgi-bin/simweb.exe">
 <P>Please specify the Gain value:
 <INPUT NAME="gain" SIZE="5"><BR>
 <INPUT TYPE="SUBMIT" VALUE="Go!">
 </FORM>
 </body></html>

Save the file once you have modified it.

9. Transfer the following files/folders to your cgi-bin directory:

simweb.exe

simweb.ctf

test_slwebview_files

test_slwebview.html

test.exe

paramfile.mat

10. If your Web Server is running locally, you should be able to reach the test project through the following URL:

"http://localhost/cgi-bin/test_slwebview.html"

At this point, you should be able to see your Simulink model and modify the Gain value. After you hit the "Go!" button, the output will be displayed.

Best Answer

Related Solutions

MATLAB: Do I receive an error ” The conversion from UNKNOWN to NCHAR is unsupported” when working with DATAINSERT or FASTINSERT in Database Toolbox 3.10 (R2012a)

MATLAB: How to deploy a Simulink model over the web using MATLAB Compiler 4.5 (R2006b)

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