
Dear R users,
i have a matrix with 31 rows and 444 columns and i want to extract every 37th column of that matrix starting from 1. more precisely i want to select columns 1, 38,75, 112 and so on. then doing the same by starting from column number 2(2,39,76,113.......).
i know that there is a manual way of doing it but i wanted to make it more quickly as i have fairly large data to dealth with.
 
thanks in advance
eliza  		 	   		  
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