* names = a string vector, collecting the names of the ts to add to the tsmat
Output
tsmat = the original tsmat extended with the new ts
DESCRIPTION
Adds a timeseries to a tsmat.
EXAMPLE
load(GROCERDIR+'/data/bdhenderic.dat')// trasnforms Hendry and Ericsson database tsmat=db2tsmat(GROCERDIR+'/data/bdhenderic.dat');// trasnforms Hendry and Ericsson database into a tsmatm1=exp(lm1)// calculate m1 from lm1tsmat2=addts2tsmat(tsmat,'m1')// add m1 to the tsmat