
I have a lot (more than one hundred) of files with tables of the same kind (quadratic, same size) and I want to obtain some statistics for every position on them. Therefore, as a result I want another table. I import every table, and create an object “read.table” for it, then I have try to create a “list” or a “data frame“ and directly utilize some functions like sd( ) without success, because it calculate sd for the columns . Which kind of “object” should I create in order to utilize directly this kind of functions?  Should I program it throw for loops?

David



		
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