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Results tagged with data-cleaning
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user 44149
Data cleaning is a preliminary step to statistical analysis in which the data-set is edited to correct errors and to put it into a form suitable for processing by statistical software.
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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 …
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