Reshaping data with count
22696
Faster ways to calculate frequencies and cast from long to wide
8720
How to count rows?
106247
Count number of rows with conditions met in two columns
152949
Reshape multiple value columns to wide format
3989
Preprocess categorical variables with many values
100371
Creating a histogram using aggregated data
146677
Create several new derived variables from existing variables in data.frame
34433
Transpose / reshape dataframe without "timevar" from long to wide format
6493
Repeat each row of data.frame the number of times specified in a column
16572
pandas convert some columns into rows
21701
Histograms with pre-counted data
131373
converting string IDs into numbers in a multilevel analysis using R
77039
Statistical test in R for count data
121414
Aggregate data in R
108147
count data that does not follow poisson distribution
79310
Transpose a single column to multiple rows
21821
Reshaping multiple sets of measurement columns (wide format) into single columns (long format)