Why is pck command not working on Matlab R2016b ?

we can define a system as sys = pck(A,B,C,D) , where 'pck' takes consistent state-space data and forms a SYSTEM matrix with the data structure defined. But what I see is that matlab R2016b does not read the command pck or unpck. The toolbox for pck should be downloaded, but I dont know from where . So if anyone can help , it will be great....

Answer 1

[Walter Roberson]

pck and unpck were from Mu Analysis and Synthesis Toolbox from the early 1990's.

According to https://www.mathworks.com/matlabcentral/newsreader/view_thread/25964 the correspondences in MATLAB are

mu -> robust

pck -> ss

unpck -> ssdata

starp -> lft