Is the 'envelope' function included in R2015b?

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!

Answer 1

[Andreas Goser]

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)

[Andreas Goser]

I see you should have access to a university license including that product.

[Li Yang]

Thank you Andreas,I did not have my signal processing toolbox properly installed. Now it works!

Answer 2

[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?

[Steven Lord]

The note at the bottom of the documentation page indicates it was "Introduced in R2015b", the release after the one you're using.