demo can not run, for function lasso in matlab 2014a

Hi Is there anyone who have tried the lasso in matlab 2014a? I have tried it in several PC, it doesn't work and report mistakes for either lasso or lassoglm However, it works in lower edition, e.g. matlab 2013 and matlab 2012b the demo code is from the help document like that

n = 1000; p = 250;
X = randn(n,p);
beta = randn(p,1); beta0 = randn;
Y = beta0 + X*beta + randn(n,1);
lambda = 0:.01:.5;
[B,S] = lasso(X,Y,'Lambda',lambda);
lassoPlot(B,S);

[N/A]

Your code executes on 2014b. Posting the error you get might make it easier to find answers.

Answer 1

[Walter Roberson]

lasso() is part of the Statistics toolbox. It is possible that Stats toolbox is not installed or not licensed on some of your versions.

[Zhao]

nope, I am using the campus licence and it contains the Stats toolbox and Optimization tool box. I checked the source code and find that in lasso.m , on line 626 and 872, it is

[X0,muX,sigmaX] = zscore(X,1); % line 626
[X0,~,~] = zscore(X,1); % line 872

However, the function zscour() should just have 1 argument, which is

 function [x, mu, sigma] = zscore(x)

I delete the argument 1 and it can run now. I just want to know is there any other guys meet this problem in 2014a? Since there is no problems on other PCs which has matlab 2012b and 2013

[Alan Weiss]

Take a look at the code for zscore:

 function [z,mu,sigma] = zscore(x,flag,dim)

So there is nothing wrong with calling zscore(X,1). Whatever the problem is, it is not because the script uses an unsupported syntax.

Alan Weiss

MATLAB mathematical toolbox documentation