Fixed some error

I deleted this chuck of the code, which turns out to be unnecessary.
ind_Xtest = A(ind_test, :);
ind_Xtrain = A(ind_train, :);
CV ordered, with labels

This version is applicable to current simulation data set. Compare to
previous version, it can accept one more parameter: number of row
labels. (And it has no difference, if you set the row labels equals to
1)
Store the indices

In this version, the indices were stored in two variables, in order to
make this CV indices generator easy to apply.
Full Cross Validation

The second code (analysis04_full_CV_2) is the full cross validation.
The other code is an intermediate step.

The visualization of the results remains to be done, as there is some
issues when storing the outputs for the Lasso.