혹시 video numbers(으)로 찾으셨나요?

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• xts R # Load xts library(xts) # View the structure of ex_matrix str(ex_matrix) # Extract the 3rd observation the 3rd observation of the 2nd column of core core[3, 2] # Create the object data using 5 random numbers blog.naver.com · 2017.05.30