What is this hds folder missing in 2017a?

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Mario
Mario 2017-4-3
评论： Walter Roberson 2017-4-7
I was running 2016b, but recently install 2017a. Then, I get the error message that the path to toolbox\matlab\hds does not exits. in 2016b the folder is there. It includes these functions: hdsCatArray, hdsGetSize, and so on. In 2017a the folder is not there. Is this an old AddOn? Discontinue functions? Thanks

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Varun Gunda
Varun Gunda 2017-4-6
编辑：Varun Gunda 2017-4-6
HDS toolbox is not a product of MathWorks. Its a third party submission. More information about this toolbox can be found here:
https://www.openhub.net/p/hds-toolbox
You can download the toolbox from github, following the procedure given here.
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Walter Roberson
Walter Roberson 2017-4-7
Look at the code in any file in the toolbox/matlab/hds directory in R2016b or earlier to see Mathworks's copyright on their Hierarchical Data Storage routines. The function names are not the same as the package you linked to - the third party one appears to be independent of the Mathworks one.
The only Mathworks documentation I have found for the routines is the comments in the source code.
Walter Roberson
Walter Roberson 2017-4-7
For example /Applications/MATLAB_R2011a.app/toolbox/matlab/hds/hdsCatArray.m contains in part,
% Copyright 1986-2004 The MathWorks, Inc.
% $Revision: 1.1.6.2 $ $Date: 2005/12/22 18:15:17 $
By R2016b the revision number information was gone, but the 1986-2004 copyright remained.
@hds/@spreadsheet/spreadsheet.m was changed as late as 2014 copyright, and @hds/@TestLog/TestLog.m as well, but otherwise almost all the rest are 2004, 2005, or (sometimes) 2007.

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