Is the 'envelope' function included in R2015b?

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Li Yang
Li Yang 2016-2-19
评论： Steven Lord 2016-9-6
Hi, I found the 'envelope' function described in http://www.mathworks.com/help/signal/ref/envelope.html very useful for my project, the document says this function is included in R2015b, but I can't run the example code with this function (the chirp function also not working with my R2015b). By the way, I am using an academic license. Can anyone make clear how can I use this function? Thank you!

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采纳的回答

Andreas Goser
Andreas Goser 2016-2-19
I have this function in my installation
>> which envelope
C:\Program Files\MATLAB\R2015b\toolbox\signal\signal\envelope.m
Path suggests it is part of the Signal Processing Toolbox. Can you run "ver" to verify you have it installed? It should look like
ver
----------------------------------------------------------------------------------------------------
MATLAB Version: 8.6.0.267246 (R2015b)
MATLAB License Number: xxxxx
Operating System: Microsoft Windows 7 Enterprise Version 6.1 (Build 7601: Service Pack 1)
Java Version: Java 1.7.0_60-b19 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
----------------------------------------------------------------------------------------------------
MATLAB Version 8.6 (R2015b)
...
Signal Processing Toolbox Version 7.1 (R2015b)
  2 个评论
Andreas Goser
Andreas Goser 2016-2-19
I see you should have access to a university license including that product.
Li Yang
Li Yang 2016-2-19
Thank you Andreas,I did not have my signal processing toolbox properly installed. Now it works!

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更多回答（1 个）

Humberto Contreras-Tello
Hello,I have installed the signal processing toolbox but the function envelope is not found. I have MATLAB 2015a academic license. Is the function not found in this version of MATLAB?
  1 个评论
Steven Lord
Steven Lord 2016-9-6
The note at the bottom of the documentation page indicates it was "Introduced in R2015b", the release after the one you're using.

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