Problem with Autocorr/ACF function

Hi All I am a new MATLAB user, I am trying plot ACF functions for 12 lags, so basically I am using the following function: [ACF, lags, bounds] = autocorr(U, [], 12) bounds 0.0928 -0.0928 But i am getting an error message as follows

??? Undefined function or method 'autocorr' for input arguments of type 'double'.

Please provide some insight! Thank you so much!

Answer 1

[the cyclist]

autocorr() is a function in the Econometrics Toolbox, which is not part of core MATLAB. Are you sure you have that toolbox? What is the output of the command

which autocorr

[Fiona Li]

what if I already have econometrics toolbox but still show the same error?

[the cyclist]

Does the command

ver

show that the toolbox is installed?

What does the command

which autocorr

show?

(Also, you might want to start a new question. Although it is related to this older one, it was pure luck that I happened to stumble on this comment on an old answer of mine, and probably no one else will notice it.)