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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stat_ellipse() in MCA plot does not cover jittered points / extends far beyond the data

I am creating a Multiple Correspondence Analysis (MCA) plot in R using FactoMineR, factoextra, and ggplot2. The goal is to add confidence ellipses around the archetype categories in the MCA space. The ...

Nikos

asked 1 hour ago

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Creating new variables for -n exact months to an enddate

I have datasets that contain information about healthcare use of individuals called data2014-data2021. Each individual has an enddate (called 'limiet' in the code) which can be somewhere in 2014-2021. ...

Stefan Vrinzen

asked 4 hours ago

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RStudio error message said ggplot data is too long for aesthetic

I was meddling with R programming and trying to graph distribution of 2 variables in a data frame. However, the code gave me the warning: G2;H2;Warningh in geom_density(adjust = 1, alpha = 0.5) : [38;...

Oyster

modified 10 hours ago

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FlowSOM randomly stops because of missing consensus.pdf

Recently I got into some trouble when using FlowSOM Clustering from the FlowSOM package in R. An Error shows up while a vectorized function is running, but it seems random, not constricted to certain ...

Snow

modified 1 hour ago

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How to get rid of NaN result when using setEvidence function in gRain package when doing Bayesian modeling?

For context, I am conducting hazard modelling, examining the flow of impacts from node to node within a network using Bayesian network analysis. I have a simplified network diagram dag below which I ...

hadi

asked Nov 14 at 5:07

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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

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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

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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

Best practices

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best practice for lost database connection in long running R scripts

if I have an unstable network or very long running R scripts, I am confronted with the problem, that I may lose the database connection. Usually I initialise the connection at the start and pass it as ...

obsaditelnost

answered Nov 12 at 0:51

Answer

In my experience, DBI::dbIsValid is at best a weak indicator of a bad connection, it does not (in my experience) actually verify that the connection is still good (this likely varies by db-driver). In ...

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r2evans

167k

answered Nov 10 at 17:56

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Replace values in multiple columns in a data frame based on conditions in another data frame? [duplicate]

I'm working with a data frame where the color of an object (red or green) was recorded in ordinal classes corresponding to percent coverage. I am looking to replace all the classes with their ...

Onyambu

80.3k

modified Nov 7 at 18:59

Answer

I think https://stackoverflow.com/a/79812681 provides the most performant and simplest approach: a lookup table using a named vector of values. Another alternative (at the expensive of a little ...

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r2evans

167k

answered Nov 7 at 18:32

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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

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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 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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