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Sort data frame

Ordering a data frame by a particular column can be quicker than doing it in excel, if the data frame is large.

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Normalise data

If x is the normalised data and y is the old data, we would like to do y = (x-mean(x))/sd(x)

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Merge data

You will often want to combine different datasets with a column in common. This is easy to do in R.

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