MATLAB Answers

Where can I find a list of built-in example data?

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Chad Greene
Chad Greene on 17 Jun 2014
Edited: Jason Nicholson on 18 Jun 2014
When I come up with examples for functions that I write, the first several lines of my example files are often spent creating fake data. Example data like load train are quite helpful because they are built into Matlab, but I have not been able to find a clear list of what example data are available, and on what Matlab releases.
For my current task, I'd like to find a chart of example data associated with the Mapping Toolbox. Does this list exist somewhere?

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Geoff Hayes
Geoff Hayes on 17 Jun 2014
I'm not sure that such a list for each toolbox exists. I noticed that the Statistics Toolbox mentioned some of the data sets that it includes ( http://www.mathworks.com/help/stats/_bq9uxn4.html) but I couldn't see anything for the Mapping Toolbox. You may have to do what Jason suggests below.

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Answers (2)

Jason Nicholson
Jason Nicholson on 17 Jun 2014
Edited: Jason Nicholson on 17 Jun 2014
This will work:
pathFolderList = strsplit(path(),';');
matFilesOnPath = cell(size(pathFolderList));
matFileCount = 0;
for iFolder=1:length(pathFolderList)
matFilesOnPath{iFolder} = ls([pathFolderList{iFolder} filesep '*.mat']);
matFileCount = matFileCount + size(matFilesOnPath{iFolder},1);
end
I had 1,025 mat files on my path.
Bare in mind that you may have toolboxes other will not. If you stick to the folders contained as part of the core MATLAB functionality, you should be able to find data that everyone has if the versions are the same.

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Chad Greene
Chad Greene on 17 Jun 2014
Is strsplit a new function? I see it in the online documentation for R2014a, but I have R2012b.
Image Analyst
Image Analyst on 17 Jun 2014
You can use allwords:
folderNamesList = allwords(someStringWithSemicolons,';');
Jason Nicholson
Jason Nicholson on 18 Jun 2014
Yes, strsplit is new. The copyright in the file says 2012.
You can also use
pathFolderList = regexp(path(), ';', 'split');
regexp has been around for a long time.

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the cyclist
the cyclist on 17 Jun 2014
I don't know if this is a complete list, but here are some examples .

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