R programming: plyr how to count values from a column with ddply
22696
Faster ways to calculate frequencies and cast from long to wide
29638
Count number of occurences for each unique value
13177
Numbering rows within groups in a data frame
74036
Count the occurrences of DISTINCT values
55747
Grouping functions (tapply, by, aggregate) and the *apply family
69504
List array duplicates with count
145742
Repeat rows of a data.frame N times
3455
unique combinations of values in selected columns in pandas data frame and count
108147
count data that does not follow poisson distribution
132276
How to sum data.frame column values?
100214
Group by multiple columns in dplyr, using string vector input
132210
How to assign a counter to a specific subset of a data.frame which is defined by a factor combination?
25168
Excel: how to count number of distinct values in a range with condition?
6493
Repeat each row of data.frame the number of times specified in a column
118785
Control number of decimal places on xtable output in R
103089
Count and use the number of items in advance
139554
How can I count runs in a sequence?