how to test if toolbox exists?

I am writings some code that I wish to distribute open source. Within my code, I'd like to check if the end-users have fsolve in their installation and if not, use fzero. I'd rather the end-user not get ugly messages about functions not existing, and beginners will be so confused about what to do to fix the error, or they will hate Matlab. Is there a way that this can be implemented easily?

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/techdoc/ref/license.html

For example,

license('test', 'image_toolbox')

[Mohammad Nazrin Jumali]

it says '1', what does it mean?

[Walter Roberson]

It means the license does exist.

[Farid]

what should I type for deep learning toolbox, please?

[Image Analyst]

@Farid, use the line below for Neural_Network_Toolbox to see if you have a license for the Deep Learning Toolbox.

% Check that user has the specified Toolbox installed and licensed.
hasLicenseForToolbox = license('test', 'image_toolbox');	% Check for Image Processing Toolbox.
% hasLicenseForToolbox = license('test', 'Image_Acquisition_Toolbox');	% Check for Image Acquisition Toolbox.
% hasLicenseForToolbox = license('test', 'Statistics_Toolbox');	% Check for Statistics and Machine Learning Toolbox.
% hasLicenseForToolbox = license('test', 'Signal_Toolbox');	% Check for Signal Processing Toolbox.
% hasLicenseForToolbox = license('test', 'Video_and_Image_Blockset');	% Check for Computer Vision System Toolbox.
hasLicenseForToolbox = license('test', 'Neural_Network_Toolbox');	% Check for Deep Learning Toolbox.

[Farid]

@Image Analyst Thank you so much. it doesn't answer my question tho. I asked about the deep learning toolbox as it can be seen in >>ver.

[Farid]

I embedded @Reza Ahmadzadeh's code in mine to resolve the problem anyway.

[Image Analyst]

When you asked "what should I type for deep learning toolbox, please?" I assumed you wanted a logical variable that gave true or false for whether or not you had the Deep Learning Toolbox. So that's why I gave you

hasLicenseForToolbox = license('test', 'Neural_Network_Toolbox');	% Check for Deep Learning Toolbox.

It does exactly that, which is what I thought you asked. Not sure why you said it didn't resolve your problem unless "what should I type for deep learning toolbox, please?" means something different than "what can I type to determine if I have a license for the Deep Learning Toolbox?"

@Reza Ahmadzadeh's code depends on a third party function, not a simple, built-in, one-line function call like I gave you. There is no need to use Reza's code (like the comment after it said).

Answer 2

[Image Analyst]

Here's the code I use:

% Check that user has the Image Processing Toolbox installed.
hasIPT = license('test', 'image_toolbox');
if ~hasIPT
  % User does not have the toolbox installed.
  message = sprintf('Sorry, but you do not seem to have the Image Processing Toolbox.\nDo you want to try to continue anyway?');
  reply = questdlg(message, 'Toolbox missing', 'Yes', 'No', 'Yes');
  if strcmpi(reply, 'No')
    % User said No, so exit.
    return;
  end
end

You'll need to adapt it for any toolboxes that you want to check.

Answer 3

[Geoff]

Try this:

v = ver;
has_fsolve = any(strcmp(cellstr(char(v.Name)), 'Optimization Toolbox'));

Or more specifically:

has_fsolve = ~isempty(which('fsolve'));

[Jan]

{v.Name} is nicer than "cellstr(char(v.Name))".

[Geoff]

Oh, thanks =) I get a bit baffled sometimes when things look like the right type but return multiple answers. That's a much nicer syntax.

Answer 4

[Reza Ahmadzadeh]

You can use the existing function in FileExchange called isToolboxAvailable . The usage is as follows:

result = isToolboxAvailable('image processing toolbox','error');

[Kjartan Andersen]

Not a good idea to have an external functionality to check for dependencies. What if the user doesn't have this tool?