MATLAB: How to import an image of the Simulink model directly to a MATLAB variable

imageMATLABmodelsimulink

I have a Simulink model, and I would like to store the image of that model in a MATLAB variable. I would prefer to do this directly without creating extraneous image files.

Best Answer

The ability to directly import the image of a Simulink model to a MATLAB variable is not available in MATLAB.

To work around this issue, the image can be written to a file and subsequently read into MATLAB using an example like the following:

% Select the Simulink model to bring it into focus.Then, execute the following:
print -smodelname -djpeg myscreenshot.jpg
A=imread('myscreenshot.jpg');

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MATLAB: Directly open custom documentation

It hasn't bothered me, but

doc toolbox_name

If the name is unique enough it produces a short list of search results. In my case the page of interest is the top one. One extra click needed.

Next a one-liner, which opens the documentation home page in the help browser (using a bit of magic)

web('documentation_home_page.html','-new')

However, this must be hidden from the user in one way or another and still be easy to use. A favorite doesn't really provide much of an improvement.

/R2018b

In response to comment

The magic works better for me

>> web('m2umlToolbox.html', '-new')

produces this

The function, builtin, doesn't work with doc, but How do I invoke a shadowed core MATLAB function does. Now

doc m2uml

opens the page shown above and

doc plot

opens the expected Matlab page.

Listing of doc

function    doc( varargin )
    
    persistent mdc
    if isempty( mdc )
      wch = which('doc.m','-all'); 
      isf = contains( wch, matlabroot ); % there should only be one
      wch = wch{isf};
      pth = fileparts( wch );
      old = cd( pth ); 
      mdc = str2func('doc');  % create a function-handle
      cd( old ); 
    end    
    
    switch varargin{1}
        case 'm2uml'
            web('m2umlToolbox.html', '-new')
        otherwise
            mdc( varargin{:} )
    end
end

Files and search path

I've used the word "magic" a couple of times to indicate that I don't understand how it works or what's required to make it work. I've stumbled upon one way that hasn't failed so far.

My starting point was the blog, Best Practices – Adapt, then Adopt! Posted by Andy Campbell, January 13, 2017 , which predates my R2018b. This blog "presents" the FEX-submission, Toolbox Tools 1.1 by Amy Koh, [Staff], A toolbox for developing custom toolboxes in MATLAB. This toolbox was "Created with R2017b" and is "Compatible with any release".

Important files, i.e files which I beleive are required

...\tbx\info.xml where tbx is on the search path. Used by Matlab to find the documentation (i.e. create some kind of database entry)
...\tbx\doc\helptoc.xml where doc is on the search path.
...\tbx\doc\*.html all the html-files

where info.xml (there must be exactly one info.xml with the name-tag-value m2uml)

<productinfo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="optional">
<?xml-stylesheet type="text/xsl"href="optional"?>
<!-- Copyright 2019 The MathWorks Ltd. -->
<matlabrelease>R2018b</matlabrelease>
<name>m2uml</name>
<type>toolbox</type>
<icon></icon>
<help_location>doc</help_location>
</productinfo>

and helptoc.xml

<?xml version='1.0' encoding="utf-8"?>
<toc version="2.0">
    <tocitem target="m2umlToolbox.html">            m2uml Toolbox          
        <tocitem target="Overview.html">                Overview                </tocitem>
        <tocitem target="Installation.html">            Installation            </tocitem>
        <tocitem target="Limitations.html">             Limitations             </tocitem>
        <tocitem target="IntroductoryExamples.html">    Introductory examples   </tocitem>
        <tocitem target="Options.html">                 Options                 </tocitem>
        <tocitem target="UserInterface.html">           User interface          </tocitem>
        <tocitem target="Layout.html">                  Layout                  </tocitem>
        <tocitem target="Relationships.html">           Relationships           </tocitem>
        <tocitem target="ImageRow.html">                ImageRow                </tocitem>
        <tocitem target="Examples.html">                Examples                </tocitem>
        <tocitem target="TechnicalDocumentation.html">  Technical documentation </tocitem>
    </tocitem>
</toc>

It seems, it doesn't matter which html-file (in the folder, doc) I open

>> web('ImageRow.html','-new')

works as I have come to expect (i.e. navigation panel to the left).

MATLAB: Index returned array directly

No. This topic has been discussed many, many times on the newsgroup.

Best Answer

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