* fq = the low frequency of the result ts, defined as a number or a string
Output
* carry = the resulting carryover
DESCRIPTION
Performs the carryover of a time series.
EXAMPLE
//load French cpi collected in February 2022, that ends in JanuaryglobalGROCERDIR;load(GROCERDIR+'\data\fra_cpi.dat')// calculate the annual carryovercarryover(ipc,'a')// calculate the quarterly carryovercarryover(ipc,'q')