R Language Collective

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 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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how to read_html https://finngen.gitbook.io/documentation in r

I use read_html("https://finngen.gitbook.io/documentation") with error Error in open.connection(x, "rb") : cannot open the connection however i can oepn https://finngen.gitbook....

zhang jing

asked 1 hour ago

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tbl_regression not showing p-values when compiler is running on R Markdown

I am trying to run tbl_regression() on lme4 models. In R Markdown, the p-values can be seen in the output there. However, when I try to compile to a pdf or html, the p-values disappear, while the ...

jpsmith

18.5k

modified 5 hours ago

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Find and process @concept tags in .Rd files

In several packages, I've added @concept tags to Roxygen documentation for datasets. I'd like to process these to create a datasets.csv file for the package, that would include these as tags for each ...

user101089

4,083

asked 13 hours ago

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Reuse function in a package

I'm trying to reuse a function from one of my packages that installs the latest version of my package in another package. The original package is {pkgA} and the function is update(). The function uses ...

lailaps

11.3k

modified yesterday

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RTools: why choose MinGW over MSYS2, or MinGW over MSYS2 in configure.win

Background I have an R-package that uses C under the hood and a matching configure.win for the build and install process. A few users have reported this bug: CMake Error: CMake was unable to find a ...

Serkan

1,965

asked 2 days ago

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R geom_contour_filled date scale

I have 3D data that are all dates. I want to plot them with a contour. I have almost what I want with geom_contour_filled of package ggplot2 but I struggle to obtain a decent legend as dates (I'd like ...

stefan

130k

modified yesterday

Answer

One option would be to pass a function to the labels= argument of the scale to convert the interval boundaries to date labels in your desired format: library(tidyverse) ggplot(predictions) + aes(x =...

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stefan

130k

answered yesterday

2 votes

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Flag rows if the time in a column falls within a specified window of another column

I have a dataframe where each row represents a detection of a fish. The fish can be either, Brown Trout (Fish.ID starts with TB_) or Salmon/Parr (Fish.ID starts with TA_). I want to create a new ...

M--

33.6k

modified Nov 14 at 20:12

Answer

Regarding the solutions in the accepted answer, the (now deleted) data.table approach creates multiple intermediate tables, sorts them, and uses foverlaps() which results in wasting 15GB+ of memory ...

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M--

33.6k

answered Nov 13 at 21:10

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ShinyApp that pulls from Google Sheet

I am trying to make a shinyapp that uses location and character data from a Google Sheet to generate a map. library(shiny) library(leaflet) library(tidyverse) library(googlesheets4) library(shinyjs) ...

Jan

11.9k

modified Nov 11 at 22:05

Answer Accepted

From the googlesheets4::read_sheet's documentation: ... col_types gives control of column types, similar to how col_types works in readr and readxl. Note that currently there is only support for the “...

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M--

33.6k

answered Nov 11 at 21:42

Best practices

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Looping Datasets in R

Essentially I am trying to create a dataset that is dependent on prior rows to generate values for any given row. I then would like to run this loop over many IDs for an entire dataset. Current set up ...

HenrikB

6,930

answered Nov 11 at 20:49

Answer

It's not clear what you mean with columns 10, 11, 12, and 13. While I'm guessing 10-11 default to 0 and increment, columns 12-13 are unknowns. Please provide a starting set, see How to make a great R ...

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r2evans

167k

answered Nov 10 at 20:20

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Secr model by station, session and site

I'm trying to use the secr package to estimate rodent density. What I want exactly is to calculate density by station within each site (15 stations in each of the 12 sites) and by session. Each ...

MrFlick

209k

answered Nov 11 at 14:55

Answer

If you want modeling advice, you should instead as for help at https://stats.stackexchange.com/. Or at the very least provide some sample data with the desired output so possible solutions can be ...

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MrFlick

209k

answered Nov 11 at 14:55

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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

76.3k

modified Apr 2 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

993 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 at 14:12

1052 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

42.8k

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 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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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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