More resources for R
R aggregates
R mean, median, mode
R variance, SD (standard deviation)
R joining tables
R quartiles, quantiles, IQR (interquartile range)
R cheat sheet [agg].pdf
505.9 KBR cheat sheet [join tables].pdf
742.2 KBR cheat sheet [mean median mode].pdf
225.3 KBR cheat sheet [quartiles quantiles iqr].pdf
312.1 KBR cheat sheet [variance sd].pdf
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