R Summarize data with by group of three variables
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Faster ways to calculate frequencies and cast from long to wide
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Plot a multi-line text box in R
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Transform Data to Desired Mean and Standard Deviation
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Preprocess categorical variables with many values
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How to do a regression of a series of variables without typing each variable name
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converting string IDs into numbers in a multilevel analysis using R
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How to sum a variable by group
31519
R: subsetting data frame by both certain column names (as a variable) and field values
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R use ddply or aggregate
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Get the means of sub groups of means in R
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How to sum up values of each two rows across their line in linux
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Sum over n variables
40354
In r, get output values in power curve for 'a' and 'b' values
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Count number of rows per group and add result to original data frame
63930
How can I "group by" and sum a column in excel?
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Plot 3 column of data set in one Plot
100214
Group by multiple columns in dplyr, using string vector input