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Results tagged with r
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user 44149
R is a free, open-source programming language and software environment for statistical computing, bioinformatics, and graphics.
0
votes
Extracting data from a data frame with conditions
To accomplish the task, first attach data stored in a df object, then use aggregate function:
attach(df)
aggregate(freq ~ year, FUN=max)
which outputs:
year freq
1 2002 3
2 2003 5
3 2004 …
- 101
0
votes
How to group by multiple columns in dataframe using R and do aggregate function
Also is possible to do the task using a very reliable and trusted R base functions:
df <- data.frame(stringsAsFactors=FALSE,
country = c("Austia", "Austia", "Austia", "Austia", "Austia", "Austia …
- 101
0
votes
R-GUI How do i aggregate survey data collected for multiple years and see if they contain a ...
For the given example:
df <- data.frame(Study=c('Study_1', 'Study_1', 'Study_2', 'Study_3'), col1=c(NA,NA,5,8), col2=c(8, NA, NA, 7))
apply(df,2, function(x) sum(is.na(x)==F))
shows that number of no …
- 101