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How-to guide

How to write a good R question with a reproducible example

This article is largely written based on https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example When posting a question to Stack Overflow, you should include a minimal ...

anon

created Aug 28, 2023 at 18:58

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21 votes

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R Language Frequently Asked Questions

The questions that get asked repeatedly, gathered together in one place. What’s a question every R programmer asks at some point? Add it here! Grab questions from the r-faq tag to get them added ...

Berthold♦

answered Aug 2, 2023 at 17:39

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How to include a topics filter in the oa_fetch function from the openalexR package?

I want to retrieve from openalex a list of all the works on non-standard work schedules in the social sciences. In R, I used the script attached below. I am using the oa_fetch function from the ...

cielo_azzurro

asked yesterday

1 vote

0 answers

56 views

how to add dependency stock indicators in highcharter package

library(highcharter) library(tidyverse) library(quantmod) x <- getSymbols("AAPL", auto.assign = F) x <- xts::last(x, n = "3 years") highchart( type = "stock" ) |...

김태환

asked yesterday

3 votes

0 answers

76 views

Sending emails through local proxy

I need to bypass Iran's internet censorship to send emails using R's emayili package. The standard gmail() function fails because the regime blocks the default SMTP protocol. My goal: Use local HTTP/...

a.sa.5969

asked 2 days ago

0 votes

0 answers

55 views

How to implement an anisotropic Gaussian filter with position-dependent σ from a viewing angle raster?

I am working on downscaling (increasing the spatial resolution) satellite imagery from VIIRS (VNP46A2 nighttime lights product). VIIRS is a whiskbroom sensor, and I need to model its point spread ...

Nikos

modified yesterday

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0 answers

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RStudio not finding RTools installed different location

Sorry, I think variants of this have been answered before, but I can't seem to figure out the solution. I am running R4.3.3 in RStudio on a company-provided laptop which is very ringfenced and needs ...

M--

34.3k

modified Jan 30 at 19:51

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Add rtf files to docx with body_add_docx

In earlier versions of the officer package, I was able to use body_add_docx() to insert rtf files (or lst, it's quite the same) into an existing Word document without issues. After updating to a newer ...

MrFlick

209k

answered 6 hours ago

Answer

I don't see any evidence that the officer package used to allow you to combine rtf and docx files. It looks like you do have to convert rtf to docx with something like pandoc. You can do that with ...

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MrFlick

209k

answered 6 hours ago

3 votes

1 answer

65 views

Correct grouping of stacked bars with color and pattern fill

I'm using geom_col_pattern to create a stacked bar chart where bars are colored by party and patterned by a binary variable (consequence: 0 or 1). I want bars from the same party to be adjacent to ...

CommunityBot

modified 20 hours ago

Answer Accepted

Add group = interaction(party, consequence, lex.order = TRUE) to aes(): ggplot(df, aes(x = year, y = n, fill = party, group = interaction(party, consequence, lex.order = TRUE))) + ...

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M--

34.3k

answered yesterday

7 votes

4 answers

312 views

How to calculate sum of subsequent rows in a dataframe changing the reference row under condition

I am trying to implement the difference between dates with respect to a reference one and within group (multiple observations of the same subject in different days). However, the reference date may ...

jay.sf

76.5k

answered 14 hours ago

Answer

Using purrr::accumulate to find the anchor_date based on your logic (if more than 28 days, use that): library(dplyr) df %>% mutate(date_ric = as.Date(date_ric)) %>% arrange(ID, date_ric, ....

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M--

34.3k

answered yesterday

1 vote

2 answers

66 views

How can I position_dodge individual points within a grouped boxplot using ggplot2

I have a dataset where I am trying to show that variation in Var2 across groups within grouping categories is correlated with variation in Var1, especially when breaking down variation among a ...

M--

34.3k

answered yesterday

Answer

I like stefan's solution, but if you wanna stick to your filtering approach, you need to manually define the position: df %>% ggplot(aes(x = Grouping1,y = Var2)) + geom_violin(data = . %>% ...

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M--

34.3k

answered yesterday

1 vote

2 answers

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Weird behaviour when combining data.table .EACHI and joining

I came across weird behaviour of data.table. A dataset is split into to disjoint groups [e.g. treated and untreated] Then, a join is performed. The goal is, for each treated, to find and untreated ...

r2evans

168k

modified yesterday

Answer

I think your expectation of .EACHI is correct, but "which" frame is i is skewed. Your join is this: treated[i = untreated, j = .(exposed.id, ...), on = .(cov), by = .EACHI, nomatch = NULL] ...

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r2evans

168k

answered 2 days ago

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2463 votes

23 answers

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How to make a great R reproducible example

When discussing performance with colleagues, teaching, sending a bug report or searching for guidance on mailing lists and here on Stack Overflow, a reproducible example is often asked and always ...

jay.sf

76.5k

modified Apr 2, 2025 at 9:39

1512 votes

21 answers

1.4m views

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 column 'z' (descending) then by column 'b' (ascending): dd <- data.frame(b = factor(c(...

Melanie Shebel

2,958

modified Jul 16, 2024 at 4:37

996 votes

30 answers

2.2m views

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?

Antreas Stefopoulos

answered Feb 17, 2025 at 14:12

1053 votes

25 answers

2.0m views

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 individually using something like: df$x <- NULL But I was hoping to do this with fewer ...

Quinten

42.9k

answered Aug 26, 2022 at 17:16

1570 votes

14 answers

1.9m views

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 = c(rep("Alabama&...

Melanie Shebel

2,958

modified Feb 3, 2025 at 8:58

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How-to guide

How to write a good R question with a reproducible example

anon

created Aug 28, 2023 at 18:58

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3 minute read

How-to guide

Create multiple PDF/HTML reports using R Markdown in a loop

How to create multiple PDF/HTML reports in a loop using R Markdown With R Markdown, creating a PDF or HTML report is straightforward. But what if you want to create various reports? Furthermore, what ...

Guibor Camargo Salamanca

created Apr 18, 2023 at 17:48

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