I use the functions "sink" and "print" to print the results to a txt file. May I delete everything in the txt files before it start to print to the txt file? Thanks! ####### sink(file_output.txt")) for(i in c("a", "b")) { for(j in c("c", "d")) { { print(c(i,j)) print(xyz1[[i,j]]) print("t-stat") print(abc1[[i,j]]) } } } sink() #########
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