r Archives - Page 17 of 17

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 dplyr vignettes and examples that have popped up ...

April 19, 2022
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What are the differences between “=” and “

What are the differences between the assignment operators = and <- in R? I know that operators are slightly different, as this example ...

April 19, 2022
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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? 26 s 26 ...

April 18, 2022
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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 ...

April 16, 2022
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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 example data frame. ...

April 16, 2022
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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, I’ve never ...

April 14, 2022
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Sort (order) data frame rows by multiple columns

I want to sort a data frame by multiple columns. For example, with the data frame below I would like to sort by ...

April 13, 2022
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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))) df2 = data.frame(CustomerId = c(2, 4, 6), State ...

April 13, 2022
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How to make a great R reproducible example

This question’s answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. ...

April 10, 2022
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