Can somebody please Explain why I got this Error by running this code using MATLAB

2012 12 14
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Hello People, I'm trying to run this using MAtlab and got this error "Undefined function 'huffmandict' for input arguments of type 'double'". Can sb tell or explain me why this error and what can I do to solve this problem???
symbols = [1:5]; p = [.3 .3 .2 .1 .1]; [dict,avglen] = huffmandict(symbols,p) samplecode = dict{5,2} % Codeword for fifth signal value
"Undefined function 'huffmandict' for input arguments of type 'double'"

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per isakson
per isakson 2012-12-14

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Do you have the Communication Toolbx on your system? Try
>> which huffmandict
>> ver comm
I get these responses
>> which huffmandict
C:\Program Files\MATLAB\R2012a\toolbox\comm\comm\huffmandict.m
>> ver comm
-------------------------------------------------------------------------------------
MATLAB Version: 7.14.0.739 (R2012a)
MATLAB License Number: xxxxxx
Operating System: Microsoft Windows 7 Version 6.1 (Build 7601: Service Pack 1)
Java Version: Java 1.6.0_17-b04 with Sun Microsystems Inc. Java HotSpot(TM) 64-Bit Server VM mixed mode
--------------------------------------------------------------------------------------
Communications System Toolbox Version 5.2 (R2012a)

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Walter Roberta
Walter Roberta 2012-12-14
编辑：Walter Roberta 2012-12-14
I think I don't have it because I've got this answer below
which huffmandict ver comm 'huffmandict' not found. ------------------------------------------------------------------------------------------------ MATLAB Version: 7.14.0.739 (R2012a) MATLAB License Number: STUDENT Operating System: Microsoft Windows 7 Version 6.1 (Build 7601: Service Pack 1) Java Version: Java 1.6.0_17-b04 with Sun Microsystems Inc. Java HotSpot™ Client VM mixed mode ------------------------------------------------------------------------------------------------ Warning: No properly formatted Contents.m file was found for 'comm'. > In ver at 47
Now what should I do to get it?????????????????

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Jason Ross
Jason Ross 2012-12-14

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Do you have the toolbox installed that has this function? If you type "ver" at the command prompt, you should see "Communications System Toolbox"
You and also use "which" to see where the function is coming from to make sure there's not another one on your path that might be getting in the way.

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Walter Roberson
Walter Roberson 2012-12-14
Note: Communications Systems Toolbox is not one of the products included as part of the Student Version; it is, though, available at extra cost.

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