R
R is a free, open-source programming language and software environment for statistical computing, bioinformatics, visualization and general computing. Provide minimal, reproducible, representative example(s) with your questions. Use dput() for data and specify all non-base packages with library calls. Do not embed pictures for data or code, use indented code blocks.
47
votes
8
answers
776
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Rotating and spacing axis labels in ggplot2
I have a plot where the x-axis is a factor whose labels are long. While probably not an ideal visualization,
61
votes
4
answers
2.9K
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data.table vs dplyr: can one do something well the other can't or does poorly?
Overview I'm relatively familiar with data.table, not so much with dplyr. I've read through some d
53
votes
8
answers
506
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What are the differences between "=" and "<-" assignment operators in R?
What are the differences between the assignment operators = and <- in R? I know that operators are slight
61
votes
25
answers
2.7K
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How do I replace NA values with zeros in an R dataframe?
I have a data frame and some columns have NA values. How do I replace these NA values with zeroes?
60
votes
17
answers
1.7K
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Remove rows with all or some NAs (missing values) in data.frame
I'd like to remove the lines in this data frame that: a) contain NAs across all columns. Below is my exa
58
votes
21
answers
1.6K
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Drop data frame columns by name
I have a number of columns that I would like to remove from a data frame. I know that we can delete them indiv
59
votes
10
answers
642
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Grouping functions (tapply, by, aggregate) and the *apply family
Whenever I want to do something "map"py in R, I usually try to use a function in the apply family. However,
54
votes
13
answers
2.9K
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How to join (merge) data frames (inner, outer, left, right)
Given two data frames: df1 = data.frame(CustomerId = c(1:6), Product = c(rep("Toaster", 3), rep("Radio", 3)))
64
votes
19
answers
701
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How to sort a dataframe by multiple column(s)
I want to sort a data.frame by multiple columns. For example, with the data.frame below I would like to sort b
52
votes
23
answers
2K
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