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R Cheat Sheet Artificial Intelligence In Plain English Read and write a n r data file, a file type special for r. conditions a == b are equal a > b greater than a >= b greater than or equal to is.na(a) is missing a !=b not equal a < b less than a <= b less than or equal to is.null(a) is null c || e cor e c &&y cand y. R cheat sheet by dan mirman, drexel university, 2013 (v2.0). for more r cheat sheets see command establishes the base “aesthetics” of the plot, then the rest.
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