normalise function is not a part of pmtk, may be we have to use normalize one instead about pmtk3 HOT 3 OPEN

[deleted comment]

I also experienced this same problem. I don't know if there is a separate 
normalise.m file that is needed, or if changing these lines to "normalize" 
correctly solves the problem. What is more interesting is that this (possible) 
bug causes the testPmtk3 to fail:

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

Error in ==> viterbi_path at 53
    [delta(:,t), n] = normalise(delta(:,t));

Error in ==> hmmMap at 22
path = viterbi_path(pi, A, exp(logB));

Error in ==> hmmDiscreteTest at 38
decodedFromTrueViterbi = hmmMap(trueModel, observed);

Error in ==> testPmtk3 at 68
hmmDiscreteTest;

Moved to GitHub: https://github.com/probml/pmtk3/issues/32