Object Reference : Object View and Procedure Reference : Matrix
Set the column labels in a matrix object.
matrix_name.setcollabels label1 label2 label3....
Follow the setcollabels command with a space delimited list of column labels. Note that each column label should not contain spaces unless it is enclosed in quotes. If you provide fewer labels than there are columns, EViews will keep the corresponding default column names (“C11”, “C12”, etc...).
mat1.setcollabels USA UK FRANCE
sets the column label for the first column in matrix MAT1 to USA, the second to UK, and the third to FRANCE.
See Matrix::setrowlabels.