[Solved] Loop R with Quandl as optional

by


This answer assumes reading of the earlier question and comments so is not “code only”.

 qt = expand.grid(Month=c("G","J","M","Q","V"), Year=1975:2016) 
 query_names_vec <- apply(qt, 1, 
                       function(x) paste0("CME/GC", paste0( x, collapse="") ) )

> head( query_names_vec )
[1] "CME/GCG1975" "CME/GCJ1975" "CME/GCM1975" "CME/GCQ1975"
[5] "CME/GCV1975" "CME/GCG1976"

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solved Loop R with Quandl as optional