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dict

20 Apr 2008 (Updated 29 Apr 2008)

General purpose data storage object

File Information
Description	DICT is a general purpose data storage object similar to the DICT object in Python. Data is stored as key/value pairs. Keys and values can be any Matlab data type.
Acknowledgements	The author wishes to acknowledge the following in the creation of this submission: lookupTable
MATLAB release	MATLAB 7.6 (R2008a)
Other requirements	Requires the new class support in Matlab 2008a.

Tags for This File
Everyone's Tags	data storage, dict, general, utilities
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Comments and Ratings (4)
25 Apr 2008	Dimitri Shvorob	What are the advantages compared to built-in (and accessible from most Matlab versions) java.util.Hashtable?
28 Apr 2008	Doug Harriman	The only advantage that I can see is that dict has a more natural Matlab interface. In my experience, accessing Java objects is not intuitive to those not experienced with programming Java. With a cleaner Matlab wrapping interface, the Java implementation would likely be superior.
06 Oct 2008	Doug Harriman	After looking at the java.util.Hashtable object, there is one major flaw with that solution. The java hashtable seems to only be able to store object types that are also implemented in java. For Matlab object types defined by the user, the Java hashtable throws an error. The pure Matlab implementation can store any Matlab object type that can be put into a cell array. It can also use any Matlab object type as a key.
14 Apr 2009	M MA	excellent submission I wonder why matlab doesn't have built-in dictionaries

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Updates
23 Apr 2008	Fixed bug where error was caused if attempting to look up a key that did not exist. Now return empty matrix.
29 Apr 2008	Slight performance optimization. Added method to rename keys.

Tag Activity for this File
Tag	Applied By	Date/Time
dict	Doug Harriman	22 Oct 2008 09:58:30
data storage	Doug Harriman	22 Oct 2008 09:58:30
general	Doug Harriman	22 Oct 2008 09:58:30
utilities	Doug Harriman	22 Oct 2008 09:58:30

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